Malicious PDF — malware analysis report

Static analysis result for SHA-256 68a8cd9eec85f1db…

MALICIOUS

PDF

70.5 KB Created: 2020-08-19 00:32:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 52310efefa9f335953cc0fdfe08bb18e SHA-1: f6eb726dfe1c9e4230cbbb1f13ce0e62242d601b SHA-256: 68a8cd9eec85f1db07df83947ef02573bfa828dfe8f69fc96e65aad60abfaaea
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.com, which is likely used to obscure the final malicious destination. The document also contains a large number of links to other PDFs hosted on Shopify, suggesting a link farm or SEO manipulation tactic. While no scripts were explicitly extracted, the presence of embedded URLs and the ML classifier's high confidence indicate malicious intent, likely to redirect users to a phishing or malware distribution site.

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=8th+grade+math+worksheets+kuta+software
    • http://files.mybadgepassport.com/uploads/1/3/1/6/131606135/bde1fbda6a53.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/9244/2264/files/candy_crush_jelly_for_pc_free.pdf
    • https://cdn.shopify.com/s/files/1/0438/5390/6080/files/90571860683.pdf
    • https://cdn.shopify.com/s/files/1/0437/3856/2712/files/duragotukamidikig.pdf
    • https://cdn.shopify.com/s/files/1/0431/6489/3344/files/terajizana.pdf
    • https://cdn.shopify.com/s/files/1/0435/2134/3647/files/creative_thinking_for_dummies_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/7729/6543/files/9631940960.pdf
    • https://cdn.shopify.com/s/files/1/0432/2515/3698/files/circle_of_fifths_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0430/4008/0021/files/71753365268.pdf
    • https://cdn.shopify.com/s/files/1/0431/1495/4908/files/87251015102.pdf
    • https://cdn.shopify.com/s/files/1/0430/7881/1797/files/install_multiple_fonts_at_once.pdf
    • https://cdn.shopify.com/s/files/1/0441/0192/7064/files/esmo_guidelines_waldenstrom_macroglobulinemia.pdf
    • https://cdn.shopify.com/s/files/1/0429/1392/3228/files/12928050802.pdf
    • https://cdn.shopify.com/s/files/1/0435/4437/9551/files/java_hangman_code.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_off0000d7ad.bin
d4011fe459674b2f7d4202008f0e6e9f782072e9735befe7378135c537bafe12
pdf-font-stream PDF embedded font (sfnt) at offset 0xD7AD 5544 bytes
font_01_sfnt_off0000ea77.bin
51f08e32f1f93439d21456a72064325608e61e64a8b7553593e75f63f216e618
pdf-font-stream PDF embedded font (sfnt) at offset 0xEA77 10000 bytes