Malicious PDF — malware analysis report

Static analysis result for SHA-256 620128afc169f1a1…

MALICIOUS

PDF

112.7 KB Created: 2020-08-02 17:33:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 59fc387609a0371992d6466edc2e8635 SHA-1: 829786cadad10b15ab2754314be46de1255a6794 SHA-256: 620128afc169f1a1b0bfcefd9e0e37904c4a07d4ea1931d81d32ded3a118dc75
154 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded links, with a significant portion identified as a link farm. One of the primary links, 'https://ttraff.ru/pify?keyword=%25D1%2581+%25D0%25B4%25D0%25BD%25D0%25B5%25D0%25BC+%25D1%2580%25D0%25BE%25D0%25B6%25D0%25B4%25D0%25B5%25D0%25BD%25D0%25B8%25D1%258F+%25D0%25BC%25D1%2583%25D0%25B6%25D1%2587%25D0%25B8%25D0%25BD%25D0%25B5', is flagged as a malicious redirector. The presence of numerous links, many pointing to potentially malicious or redirecting domains, strongly suggests a phishing or scam attempt designed to lure users to malicious websites.

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=%25D1%2581+%25D0%25B4%25D0%25BD%25D0%25B5%25D0%25BC+%25D1%2580%25D0%25BE%25D0%25B6%25D0%25B4%25D0%25B5%25D0%25BD%25D0%25B8%25D1%258F+%25D0%25BC%25D1%2583%25D0%25B6%25D1%2587%25D0%25B8%25D0%25BD%25D0%25B5
    • http://files.sendingthelight.org/uploads/1/3/1/8/131871558/fe80a77.pdf
    • http://files.indianrocks.com/uploads/1/3/0/7/130740521/tilavo.pdf
    • http://files.dreambigathletics.org/uploads/1/3/1/3/131398242/2b6964.pdf
    • http://files.oraclefinancialgroup.com/uploads/1/3/0/9/130969061/dovebegexime_wokowewa_tepawesesimor.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/4233/9992/files/82318051200.pdf
    • https://cdn.shopify.com/s/files/1/0436/0437/7763/files/19968266118.pdf
    • https://cdn.shopify.com/s/files/1/0434/8212/0358/files/bepufusuromopafuxer.pdf
    • https://cdn.shopify.com/s/files/1/0427/6633/6167/files/change_mysql_password_mac.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/75555741983.pdf
    • https://cdn.shopify.com/s/files/1/0428/3075/8054/files/57261099627.pdf
    • https://cdn.shopify.com/s/files/1/0431/0574/7095/files/69879961103.pdf
    • https://cdn.shopify.com/s/files/1/0431/6689/2191/files/vofugolapasolozapavi.pdf
    • https://cdn.shopify.com/s/files/1/0435/4949/1359/files/zinopad.pdf
    • https://cdn.shopify.com/s/files/1/0434/4568/2328/files/sazodixa.pdf
    • https://cdn.shopify.com/s/files/1/0431/1718/3130/files/tutiwitopivapadaretaxokid.pdf
    • https://cdn.shopify.com/s/files/1/0429/5314/6517/files/18818061152.pdf
    • https://cdn.shopify.com/s/files/1/0431/8691/3431/files/94007059533.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_off000173b8.bin
2db86dc68aaab265c4860a8ecfe620cff565676e81de131f16e389236d300a32		 pdf-font-stream PDF embedded font (sfnt) at offset 0x173B8 5264 bytes
font_01_sfnt_off000184f2.bin
1e4cbc49ffea5f190bd47ffd31f873f58d897ff9ee1b971fdf9defd88184f960		 pdf-font-stream PDF embedded font (sfnt) at offset 0x184F2 14512 bytes

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