Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ddac7248b1badd7…

MALICIOUS

PDF

40.7 KB Created: 2020-10-07 02:25:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: d3c71fe970b4aefb233bed8676c5e3d8 SHA-1: e620bf70e1b37f6bf691c0d58959d2b02906624b SHA-256: 8ddac7248b1badd7727fcbb1a1e131fa29fb7e3b6d8bc8ae92325c7a2c3b4a63
202 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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.club/pify?keyword=summertime+saga+latest+version+guide+pdf In PDF document text
    • http://files.davescucina.com/uploads/1/3/1/3/131383493/1817930.pdfIn PDF document text
    • http://files.ddtmassage.com/uploads/1/3/1/4/131483112/33b45.pdfIn PDF document text
    • http://files.cooliecollection.com/uploads/1/3/0/7/130740065/lolosidi.pdfIn PDF document text
    • https://site-1039733.mozfiles.com/files/1039733/55304128156.pdfIn PDF document text
    • https://site-1039721.mozfiles.com/files/1039721/63766561208.pdfIn PDF document text
    • https://site-1043124.mozfiles.com/files/1043124/65334212709.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/1/0480/9120/1700/files/pagolutalabewiwulinegapu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8376/7713/files/af_full_form.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4175/8101/files/the_humanistic_tradition_7th_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/8425/3858/files/woxilowusipalavajasod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6049/3474/files/what_is_a_certified_birth_certificate_in_massachusetts.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3095/4655/files/85278715906.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0476/4116/5990/files/what_area_code_is_21040.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3689/3599/files/78130880825.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005fbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FBC 5524 bytes
SHA-256: 647fed80b8c590b3f513e8c7d430f5649374e7e7ec277fc13dab1b8838b1dc05
font_01_sfnt_off00007273.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7273 10420 bytes
SHA-256: 8cdc9dda047b85784fd9051e04c233d1297bb5f83204dec3312409ef3654c80a

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