Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d985c6a25431ee4…

MALICIOUS

PDF

64.7 KB Created: 2020-08-14 23:27:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 56790e9f284255190c3c5e62217e52eb SHA-1: 0864c1a0589c6ba909bd6a32fcbba4fdf3240e58 SHA-256: 7d985c6a25431ee4383193aef1b7b926a02be95174827109db1abab4ed1dc601
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 firing for PDF_MALICIOUS_REDIRECTOR_LINK pointing to 'https://ttraff.ru/pify?keyword=yaseen+sharif+free'. This suggests the document is designed to redirect users to malicious content, likely as part of a phishing or scam campaign. The presence of a large number of external links, identified by PDF_SEO_LINK_FARM, further supports this. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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=yaseen+sharif+free
    • http://files.artistdongheelee.com/uploads/1/3/1/3/131382680/luxalazadarij-sugin.pdf
    • http://files.protectourspace.org/uploads/1/3/0/8/130874330/f3e765d7938.pdf
    • http://migebazol.benjamingilpin.com/uploads/1/3/0/7/130738797/123671a44f6f.pdf
    • http://wevep.artemiziasale.com/uploads/1/3/1/4/131407406/nigimirosawix.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • https://cdn.shopify.com/s/files/1/0431/8792/9245/files/18876835434.pdf
    • https://cdn.shopify.com/s/files/1/0429/8814/2743/files/15149725642.pdf
    • https://cdn.shopify.com/s/files/1/0447/1973/4938/files/free_printable_worksheets_on_capitalization.pdf
    • https://cdn.shopify.com/s/files/1/0433/9643/2021/files/94929442510.pdf
    • https://cdn.shopify.com/s/files/1/0432/6726/0576/files/add_modifiers_tinkers.pdf
    • https://cdn.shopify.com/s/files/1/0432/1184/9890/files/dedefedi.pdf
    • https://cdn.shopify.com/s/files/1/0437/1172/5723/files/sorejokoraridig.pdf
    • https://cdn.shopify.com/s/files/1/0430/2936/4889/files/us_constitution_5th_amendment.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://www.gnu.org/copyleft/gpl.html
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007c5b.bin
ba38594799608a4d4ba89913bf4786dd5563c57589347604b79f1d562b61b5ac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C5B 1636 bytes
font_01_sfnt_off00008466.bin
6b73578daef1490c1b2929d0444a811a164443739a69df5ca7509217de3ce98a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8466 3212 bytes
font_02_sfnt_off00008fe4.bin
3de1518fb28ca7761c39e23452ba594a7878359c12f0e631b12377f055634931		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8FE4 4784 bytes
font_03_sfnt_off0000a019.bin
0d3684f6c69801ce63ccf85a205746021726370065f71f79884a4984a5bc86d0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA019 12924 bytes
font_04_sfnt_off0000c9d5.bin
261d33253fede4ab284490c11e2494deeb2fddabf40413fb6e343889d9a19584		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC9D5 17300 bytes
font_05_sfnt_off0000e38c.bin
45865d8ba210f98dcd8e91656d832d081d330f386fd67511ce70d14d70cb805a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE38C 4440 bytes

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