Malicious PDF — malware analysis report

Static analysis result for SHA-256 aab7469d14fd4371…

MALICIOUS

PDF

46.7 KB Created: 2020-10-15 10:43:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 43c6c64126c35b15330cb3192e870b67 SHA-1: e613314ec02daff4e179a2c47e55b7287114da3e SHA-256: aab7469d14fd43716079e3e929b07dec061c44b5248f384ea9dc5d915562683e
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • 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://cctraff.ru/strik?keyword=baby+wrap+instructions+newborn In PDF document text
    • https://cdn-cms.f-static.net/uploads/4365636/normal_5f87d0925458a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368746/normal_5f87b74268599.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365553/normal_5f874fe048952.pdfIn PDF document text
    • https://site-1039672.mozfiles.com/files/1039672/nuvijekujalivopelerikawa.pdfIn PDF document text
    • https://site-1037878.mozfiles.com/files/1037878/10684857985.pdfIn PDF document text
    • https://site-1039423.mozfiles.com/files/1039423/fifazokigat.pdfIn PDF document text
    • https://site-1039694.mozfiles.com/files/1039694/sugukawivuvotupuso.pdfIn PDF document text
    • https://site-1039644.mozfiles.com/files/1039644/fowuxur.pdfIn PDF document text
    • https://site-1040427.mozfiles.com/files/1040427/78504866463.pdfIn PDF document text
    • https://site-1037864.mozfiles.com/files/1037864/56001876308.pdfIn PDF document text
    • https://mogilifus.weebly.com/uploads/1/3/0/7/130739831/4102594.pdfIn PDF document text
    • https://povutepumik.weebly.com/uploads/1/3/2/7/132741486/ririxuxikasod.pdfIn PDF document text
    • https://bijifejutumaxob.weebly.com/uploads/1/3/1/3/131381781/1365787.pdfIn PDF document text
    • https://nikokabiliru.weebly.com/uploads/1/3/1/4/131409463/2511184.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/4918653.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2441/4882/files/1400302967.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/6290/6017/files/7_things_lyrics_meaning.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7922/8837/files/find_the_equivalent_capacitance_ca_of_the_network_of_capacitors.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7940/9568/files/lukawiz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7112/7206/files/sudafikadupuduveba.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006bae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BAE 5160 bytes
SHA-256: 946da672e88a4946978b21f857cb407691734b40810d33761a17479981aa74a8
font_01_sfnt_off00007d4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D4E 10064 bytes
SHA-256: 2a2cce944123b0263a9dc8c57551d1c860b2ac4c4dbe711fbdad05bd336a5030
font_02_sfnt_off00009fb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9FB8 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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