Malicious PDF — malware analysis report

Static analysis result for SHA-256 16c8adfb70b5bf6c…

MALICIOUS

PDF

41.9 KB Created: 2020-08-09 07:45:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0ee60fb4d494c80f038cc5b564231acc SHA-1: f8127d40c72c5b883b7cf8b4950662daa82674fc SHA-256: 16c8adfb70b5bf6c400ca927f358358ae69df170fa9a9b6906a4a9a1a94dfb49
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, suggesting a phishing or scam attempt. The document body, though heavily obfuscated, contains the same URL and appears to be a lure for "articles in german language pdf". The presence of numerous external PDF links, many hosted on Shopify, indicates a link farm or SEO manipulation tactic to distribute malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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=articles+in+german+language+pdf
    • http://morobun.townofwise.net/uploads/1/3/1/8/131871721/vetenufo.pdf
    • http://wozilit.seah.space/uploads/1/3/1/4/131453870/308d0875bd.pdf
    • http://noveki.tournoidevignoles.com/uploads/1/3/1/3/131383483/nujuxavulu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/0305/1171/files/95493239227.pdf
    • https://cdn.shopify.com/s/files/1/0433/5055/6821/files/mawiposesozapaderenu.pdf
    • https://cdn.shopify.com/s/files/1/0439/5961/5646/files/vagozebab.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kebiwubinixakagaxirefu.pdf
    • https://cdn.shopify.com/s/files/1/0431/8108/0738/files/pofifidarowaxupa.pdf
    • https://cdn.shopify.com/s/files/1/0431/8127/7345/files/fedafaselawape.pdf
    • https://cdn.shopify.com/s/files/1/0429/8414/5049/files/scuffham_s-_gear.pdf
    • https://cdn.shopify.com/s/files/1/0430/8333/3786/files/rakigogepuwepi.pdf
    • https://cdn.shopify.com/s/files/1/0431/5794/6519/files/tewekonimukafimenegasa.pdf
    • https://cdn.shopify.com/s/files/1/0436/3301/6982/files/xixunexujatinasebejewexag.pdf
    • https://cdn.shopify.com/s/files/1/0431/9005/9157/files/vigotimobasoxujuzaxomow.pdf
    • https://cdn.shopify.com/s/files/1/0433/7808/1955/files/hilary_s_necklace_wow.pdf
    • https://cdn.shopify.com/s/files/1/0439/1161/0520/files/resignation_letter_sample_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/lasuzopaxikabade.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_off00006716.bin
9e42e65cb33ecac401d7dea3a5537d52470976ddeb1bdd3c3fb3c6e452bada92		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6716 5464 bytes
font_01_sfnt_off00007994.bin
014db1f5b586aadf3c09816f76ffc391c1435e0b1d1a45a3eb5c3093c1e8825f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7994 9668 bytes

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