Malicious PDF — malware analysis report

Static analysis result for SHA-256 3dbe8a7f15b9dea7…

MALICIOUS

PDF

60.6 KB Created: 2020-10-26 09:08:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-03-01
MD5: 3f3dbbd746d8ec85895b46e628af6c8f SHA-1: 4af87f19c409606601d3677fa5ffd34ea3100728 SHA-256: 3dbe8a7f15b9dea7375b7490a47dfd9bcbce0614ddfbf7a37ea4fdaa8260f7f3
202 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 6

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.me/pify?keyword=download+game+legendary+heroes+mod+apk+offline In PDF document text
    • https://cdn-cms.f-static.net/uploads/4380675/normal_5f91fd6f86463.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366344/normal_5f8e6a9cb61bd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390068/normal_5f9416538e231.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366645/normal_5f8b6e016da8f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366384/normal_5f966f6e76cfe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382952/normal_5f8cf3d2800b7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370074/normal_5f88f833a5a7b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387565/normal_5f8d9e0cbbeb8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367278/normal_5f8f5dbbc2403.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6035/3429/files/tomapetebumobi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/0145/2957/files/lebeporedewar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0494/1234/1927/files/qooapp_invalid_apk_files.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/3280/2977/files/lakimojatuzazexuxegaz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/7307/6892/files/xedanewuwo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9383/5432/files/canadas_food_guide_servings_for_adults.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/2367/0708/files/walpole_and_myers_probability_and_statistics.pdfIn PDF document text
    • https://s3.amazonaws.com/fopalew/pdf_to_word_convert_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/gotenukevepunin/behavioral_approach_in_political_science.pdfIn PDF document text
    • https://s3.amazonaws.com/zirojopemup/boiling_water_reactor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/03bbd6bf-7296-46c0-b1a0-e4671f49193e/teroxitul.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8127d251-c642-403c-9d36-bb4363422420/tofuzomi.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006d98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D98 6692 bytes
SHA-256: 8e57a4d495b2732369239e9bb9b6952d3739f29caee2c3bfecbb6cc613a33927
font_01_sfnt_off0000844c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x844C 5712 bytes
SHA-256: 74b897758cb477dd394b9459ebbc7c15e4bf730402b982ae8b48d799c5b7868f
font_02_sfnt_off000097a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x97A5 2864 bytes
SHA-256: a63e71880e2ffa292815af779d36c45efd92115547cad2cc225b45f26b04975d
font_03_sfnt_off0000a3a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA3A2 11344 bytes
SHA-256: 6fb0d193418bbb104cbccba0e8a65dfe03964725f7b00287d405f232b3ddafb2
font_04_sfnt_off0000ca6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA6C 16560 bytes
SHA-256: 0c0684da66c33b82af0b9a16b9bf1ecea34459ad6b9d2b4ecd5d5f92da713dc7