Malicious PDF — malware analysis report

Static analysis result for SHA-256 56ca1531a2b016a1…

MALICIOUS

PDF

44.3 KB Created: 2020-10-25 03:42:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: bb54f7e95075061159e3fad56ab89fb8 SHA-1: 43ad3bf6f00e5c21d8109011fedf1172fa28e55c SHA-256: 56ca1531a2b016a1ed5f51571852bbd17e81adb34fc7bd049e13ac3a7b93afb4
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://ttraff.me/123?keyword=niccol%25C3%25B2+ammaniti+io+e+te+pdf In PDF document text
    • https://lujisitezolip.weebly.com/uploads/1/3/4/1/134109273/wibidixe_nowigaseraj_boledopepivesuf_winoze.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/govorikepudago-gixidawele-wawep-xoxebilepadevu.pdfIn PDF document text
    • https://kesevaze.weebly.com/uploads/1/3/1/3/131383297/suzaxiwela-gibirozuzo-sakorilufave-rasagi.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00006b81.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00006b81.bin)
    • https://cdn.shopify.com/s/files/1/0429/2735/8115/files/which_raid_level_achieves_greater_data_reliability_between_raid_3_and_raid_1.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0607/3759/files/74474304794.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6454/8762/files/56189693218.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1fdb546-126c-45f3-8cb2-06a0354f3dd2/46781804663.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1e22c03-08ff-466b-92e1-4b680f01ba2d/47252260035.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/53fa96cc-ee39-4ee5-a37a-8f37afdc579c/i_just_need_u.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/30bf6e52-2a4d-47f4-bd05-c4bc45770201/34971957986.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/6616/2845/files/xifatirerasex.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0464/2507/9960/files/northfield_elementary_school_calendar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0478/1791/6575/files/mod_ngoc_rong_super_gold_cho_android.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/0801/5513/files/24427159083.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/7598/6116/files/21045198923.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/0221/4592/files/causal_inference_machine_learning.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/2204/6616/files/life_for_my_child_is_simple_theme.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5417/7185/files/miwekenenuxolivojoriwa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9235/2928/files/pinelusilifowid.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9095/1848/files/55631648287.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/6148/9049/files/54413228936.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/6898/3969/files/666901639.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0477/3920/7836/files/paula_sheppard_now.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 extracted file (font_00_sfnt_off00006b81.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006b81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B81 5132 bytes
SHA-256: bf07ec1896be117d5f10fe75b47c39e5b5a02de33c1120a59727aa19911b0f0e
font_01_sfnt_off00007cb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7CB6 11612 bytes
SHA-256: 58ecbfc1299ce4db8b4c671f2de8f1342257d10786ed99b156e700bb795509b5