Malicious PDF — malware analysis report

Static analysis result for SHA-256 8804f920f2f72a67…

MALICIOUS

PDF

41.0 KB Created: 2020-08-04 11:03:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b73a03b9b49018049f1fc1147037aafb SHA-1: 4fbd05fc154714b1264482decd1640fa0920a581 SHA-256: 8804f920f2f72a67d8df0a62ac87306126c4404996fb43961f6c2105edb932ab
194 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which, 'https://ttraff.com/pify?keyword=architectural+design+patterns+pdf', is identified as a malicious redirector. The document body, though heavily obfuscated, contains references to this URL and other Shopify links, suggesting a lure to a malicious site disguised as a document. The presence of numerous external PDF links further indicates a link farm used for SEO poisoning or traffic redirection.

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.
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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.com/pify?keyword=architectural+design+patterns+pdf
    • http://files.discoelectroson.com/uploads/1/3/0/7/130739415/tivag.pdf
    • http://zilaga.nancymorse.com/uploads/1/3/0/7/130739590/kazojafimaxe.pdf
    • http://files.bethanyinbridgeton.com/uploads/1/3/2/6/132695354/9756061.pdf
    • http://files.curetypeone.com/uploads/1/3/1/3/131380121/dadf492e7ec13e.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/8451/2406/files/dilizejufel.pdf
    • https://cdn.shopify.com/s/files/1/0438/3650/6272/files/nox_app_player_reddit.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/48695811849.pdf
    • https://cdn.shopify.com/s/files/1/0441/0589/1992/files/madison_tv_listings.pdf
    • https://cdn.shopify.com/s/files/1/0427/4218/6150/files/79648423923.pdf
    • https://cdn.shopify.com/s/files/1/0428/0093/9164/files/58954160983.pdf
    • https://cdn.shopify.com/s/files/1/0431/8094/9659/files/47956382070.pdf
    • https://cdn.shopify.com/s/files/1/0437/3856/2712/files/wurile.pdf
    • https://cdn.shopify.com/s/files/1/0434/5161/3334/files/kebovumiw.pdf
    • https://cdn.shopify.com/s/files/1/0434/5063/0296/files/jafuvisobilisagekafixamej.pdf
    • https://cdn.shopify.com/s/files/1/0433/0287/9387/files/90909003249.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000635f.bin
1a42589c71af44dd172d5e55405a5f0a60513a4a956c5cb5b131599a073b1d75		 pdf-font-stream PDF embedded font (sfnt) at offset 0x635F 5408 bytes
font_01_sfnt_off000075be.bin
1a9382baca06f26dd72de4221205df3fb6d34730a09e790223365c7b320b3611		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75BE 9836 bytes

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