Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0d363917210498c…

MALICIOUS

PDF

62.2 KB Created: 2020-10-31 18:05:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 565408982e2cbf42aa07b27738fb4f91 SHA-1: 87bba88a0b3d5589025a99594c23dfe6af5a02cd SHA-256: a0d363917210498cb55af3a33681720603e1b524cb565155ff169c610cf75ec7
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links that redirect to malicious infrastructure, specifically a link farm designed for SEO phishing. The primary lure URL, 'https://ttraff.link/pify?keyword=prepare+for+anything+survival+manual+pdf', is flagged as a malicious redirector. This suggests the document's purpose is to trick users into clicking the link to download a seemingly legitimate PDF, which then leads to malicious content.

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.link/pify?keyword=prepare+for+anything+survival+manual+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4387046/normal_5f9cffde3beca.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410441/normal_5f9838376b349.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417329/normal_5f97c16255e46.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393502/normal_5f923ed1e1b59.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/1/0504/1582/9153/files/word_formation_list_b1.pdfIn PDF document text
    • https://s3.amazonaws.com/widiku/74887341360.pdfIn PDF document text
    • https://s3.amazonaws.com/ropuba/lean_manufacturing_for_dummies.pdfIn PDF document text
    • https://s3.amazonaws.com/banula/9403088215.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0424/7715/files/92388032748.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c45a564b-d790-4c13-b571-bdf70b8506ad/18798385163.pdfIn PDF document text
    • https://s3.amazonaws.com/tetazino/learn_german_fast.pdfIn PDF document text
    • https://s3.amazonaws.com/nimuwet/area_of_polygons_worksheet.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_off0000a707.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA707 5500 bytes
SHA-256: 4899011e6974050d4d1727bbffdcfaff57e91059d7f1e20cdc44223f16e3d760
font_01_sfnt_off0000b991.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB991 10568 bytes
SHA-256: 0c97a39f74c09cfeb7485bc74ae01ec909ab1a7273378d5246099c48944e8747
font_02_sfnt_off0000dd42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD42 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333