Malicious PDF — malware analysis report

Static analysis result for SHA-256 664fb0af216551ee…

MALICIOUS

PDF

43.4 KB Created: 2020-08-04 15:20:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1c4240e45145d093763c60c595339900 SHA-1: 689a7abacbdd800db5f97ae910aae1a26304a4e1 SHA-256: 664fb0af216551ee6921dd6e67373691440f0d35e9172df083de055ee19236a5
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a primary link to `https://ttraff.com/pify?keyword=how+to+be+even+better+manager+pdf`, which is flagged as a malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting an attempt to trick users into clicking it. The presence of a large number of external PDF links further indicates a link farm or redirection strategy. No scripts were extracted from this sample.

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=how+to+be+even+better+manager+pdf
    • http://files.magisktgott.org/uploads/1/3/0/7/130776573/7e2887781a6b6f.pdf
    • http://files.adoreweddingdesign.com/uploads/1/3/0/7/130776205/c465823d8.pdf
    • http://files.swofcp.com/uploads/1/3/1/1/131164462/zawujed.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/4831/2738/files/77199199256.pdf
    • https://cdn.shopify.com/s/files/1/0435/9097/5647/files/29459509711.pdf
    • https://cdn.shopify.com/s/files/1/0432/1699/4466/files/wobak.pdf
    • https://cdn.shopify.com/s/files/1/0439/5198/0712/files/10819915434.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/90685258811.pdf
    • https://cdn.shopify.com/s/files/1/0429/0733/6867/files/the_hills_theme_song.pdf
    • https://cdn.shopify.com/s/files/1/0429/5481/7690/files/lebezadukunopepimife.pdf
    • https://cdn.shopify.com/s/files/1/0431/1239/9010/files/wuvatib.pdf
    • https://cdn.shopify.com/s/files/1/0431/3877/7249/files/16280938201.pdf
    • https://cdn.shopify.com/s/files/1/0432/5113/8715/files/mudagukobokuvajarap.pdf
    • https://cdn.shopify.com/s/files/1/0432/3662/2498/files/ihss_direct_deposit.pdf
    • https://cdn.shopify.com/s/files/1/0438/4745/0789/files/16564899476.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_off00006c2c.bin
f37135aaf138a3fdf5f405927b2bbf317cd8483f984683141da31c747f4178b6
pdf-font-stream PDF embedded font (sfnt) at offset 0x6C2C 5404 bytes
font_01_sfnt_off00007e8b.bin
5583018caa09f209f62347146e4a2b0756090a72e72a026b534fe12a46f76973
pdf-font-stream PDF embedded font (sfnt) at offset 0x7E8B 10120 bytes