Malicious PDF — malware analysis report

Static analysis result for SHA-256 701af1c5817c436d…

MALICIOUS

PDF

40.5 KB Created: 2020-08-09 18:21:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: be9610b11592c32841e45f51e2542836 SHA-1: f48cdee41be4625aaa31b823b3e3c78e51f9efae SHA-256: 701af1c5817c436d18105a91e57680244ad5df05851dabaf6a015fc89c014836
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to external PDF files, a technique often used for SEO poisoning or to host phishing content. One critical heuristic identified a link to known malicious redirector infrastructure at 'https://ttraff.ru/pify?keyword=spelling+word+activities+pdf'. While no scripts were explicitly extracted, the ML classifier strongly indicated maliciousness, and the overall structure suggests a lure to 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.ru/pify?keyword=spelling+word+activities+pdf
    • http://tomazi.bethbongar.com/uploads/1/3/2/6/132695569/gegazamugaviwuvip.pdf
    • http://files.radiatorpipes.com/uploads/1/3/1/3/131378923/16bd42.pdf
    • http://files.roseworksconsulting.com/uploads/1/3/2/7/132740594/2303405.pdf
    • http://ruzezew.deminphotography.com/uploads/1/3/1/3/131380429/6244475.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/4492/1766/files/satanamad.pdf
    • https://cdn.shopify.com/s/files/1/0430/5243/3557/files/15268635171.pdf
    • https://cdn.shopify.com/s/files/1/0431/5817/5906/files/44685496159.pdf
    • https://cdn.shopify.com/s/files/1/0432/9419/5870/files/jujamegafexiji.pdf
    • https://cdn.shopify.com/s/files/1/0437/2591/4277/files/mozoxad.pdf
    • https://cdn.shopify.com/s/files/1/0440/6516/1366/files/xakaz.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/55742160690.pdf
    • https://cdn.shopify.com/s/files/1/0432/7548/5348/files/sizokoj.pdf
    • https://cdn.shopify.com/s/files/1/0429/6271/4773/files/toxuzalogilunaxobixokago.pdf
    • https://cdn.shopify.com/s/files/1/0432/9635/8565/files/petijakejifom.pdf
    • https://cdn.shopify.com/s/files/1/0437/2666/7925/files/kelisajob.pdf
    • https://cdn.shopify.com/s/files/1/0432/4563/3691/files/rojinolejifuv.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_off00006055.bin
74cfc17c16470596fff967a2cc2744bedcf742018a4ce4b0633e537688d877d1
pdf-font-stream PDF embedded font (sfnt) at offset 0x6055 5576 bytes
font_01_sfnt_off00007379.bin
f85018fd8be5a1762bbbb3072041fe9c3ed5d0049ba72115e2505c35bb368886
pdf-font-stream PDF embedded font (sfnt) at offset 0x7379 9864 bytes