Malicious PDF — malware analysis report

Static analysis result for SHA-256 044d2bb50881b454…

MALICIOUS

PDF

43.9 KB Created: 2020-08-01 01:31:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 46393626346c2ef3b1bf36ae72f2335c SHA-1: c99b26365697edf63c9e8af9404caa02ab9637c3 SHA-256: 044d2bb50881b4549df730969688492f5f23468570609fbe272a41e3ceeb022c
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic identifying a link to a known malicious redirector at 'https://ttraff.com/pify?keyword=sign+for+euro'. Another critical heuristic flagged the PDF for containing a mass external PDF link farm, suggesting a link farm or SEO abuse tactic. The document body's text "Sign for euro" combined with the malicious redirector link indicates a likely phishing or scam attempt.

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=sign+for+euro
    • http://files.noetikexpression.org/uploads/1/3/0/8/130815026/1828367.pdf
    • http://files.aj-marketing.co.uk/uploads/1/3/1/4/131407918/bibozebavarezob.pdf
    • http://files.cocurricular.org/uploads/1/3/0/7/130775649/ruxowanosigipiwalazi.pdf
    • http://files.smokedearthceramics.com/uploads/1/3/0/7/130739776/fijipebanimatanig.pdf
    • http://files.harzaalumni.com/uploads/1/3/1/3/131398498/vemusub_nuxevejutase_wanaxejaxos.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/6927/5286/files/nevuxegog.pdf
    • https://cdn.shopify.com/s/files/1/0434/9480/1568/files/84275799976.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kulabegidubonigupux.pdf
    • https://cdn.shopify.com/s/files/1/0433/6658/0382/files/49840566787.pdf
    • https://cdn.shopify.com/s/files/1/0428/4504/4892/files/vezezilesisob.pdf
    • https://cdn.shopify.com/s/files/1/0437/5298/0641/files/34595549462.pdf
    • https://cdn.shopify.com/s/files/1/0427/9622/0572/files/50130752281.pdf
    • https://cdn.shopify.com/s/files/1/0430/9562/1781/files/14837747727.pdf
    • https://cdn.shopify.com/s/files/1/0428/8679/1334/files/sixovaduxomekegexomovenab.pdf
    • https://cdn.shopify.com/s/files/1/0431/8560/2721/files/67429973904.pdf
    • https://cdn.shopify.com/s/files/1/0431/4749/3536/files/33274290798.pdf
    • https://cdn.shopify.com/s/files/1/0438/5931/2800/files/41626313566.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_off00006eff.bin
c2cc2ae0aa91911d7fa002bcbc75cb7670fe733216e47963cd9c277a859116fa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6EFF 4616 bytes
font_01_sfnt_off00007ecd.bin
aeb02e9336a8e29035c27091e5406432a70d28fc03fdef3b4182e0faaadfce8c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7ECD 10564 bytes

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