Malicious PDF — malware analysis report

Static analysis result for SHA-256 6098b2ba97959c38…

MALICIOUS

PDF

41.1 KB Created: 2020-07-27 16:16:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6d344f2dd12c40b82f57344bc99713a5 SHA-1: 312d1f4a266112d6c5ebfd061cde3fca764bc5e1 SHA-256: 6098b2ba97959c38ab48d3719fca6e202ffc034b9cf16087efc0befe79e2e3d3
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, ttraff.cc, which is designed to obscure the final destination of the malicious content. The document also features a large number of external PDF links, many hosted on Shopify, suggesting a link farm or SEO manipulation tactic to increase visibility. The ML classifier strongly indicates maliciousness, and the overall structure points to a phishing or malware distribution 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.cc/pify?keyword=akuntansi+keuangan+menengah+berbasis+psak+pdf
    • http://files.thesanctuaryatmn.com/uploads/1/3/1/8/131856184/d83262d07.pdf
    • http://files.memoriesofmyfather.net/uploads/1/3/1/4/131438274/fotibepulupi_kagamefugorij_rilumer_bonin.pdf
    • http://files.svplab.com/uploads/1/3/0/7/130740149/godagesaxumo.pdf
    • http://files.bartlettpaintingpros.com/uploads/1/3/1/3/131380841/b91bea.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/1290/6405/files/75936234436.pdf
    • https://cdn.shopify.com/s/files/1/0429/6540/1753/files/konogaxa.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xozujegemuzudileruzodedus.pdf
    • https://cdn.shopify.com/s/files/1/0433/3905/5253/files/49346090395.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/37394074323.pdf
    • https://cdn.shopify.com/s/files/1/0435/5240/7704/files/kogusaruwuban.pdf
    • https://cdn.shopify.com/s/files/1/0433/1805/0984/files/30625295473.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/32732230761.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/70278744099.pdf
    • https://cdn.shopify.com/s/files/1/0434/3624/5142/files/libolofep.pdf
    • https://cdn.shopify.com/s/files/1/0432/0978/5499/files/84712560192.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/85484739365.pdf
    • https://cdn.shopify.com/s/files/1/0428/0070/9791/files/tagagaxileluxuvogesetulan.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/taridulozomoxekolakinuku.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_off0000621f.bin
3009444659b94222041d63381678871967dfaa079267c6edfe2b046b7e041662		 pdf-font-stream PDF embedded font (sfnt) at offset 0x621F 5388 bytes
font_01_sfnt_off00007435.bin
152b997d04b9f668fc3ca97154191fef60097b059ec56752a4110fdc66261468		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7435 10160 bytes

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