Malicious PDF — malware analysis report

Static analysis result for SHA-256 789f1a2ca46a52b8…

MALICIOUS

PDF

39.8 KB Created: 2020-08-24 06:55:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8d90ed7944a6fbc3847e9976c4e16bce SHA-1: f3ed4270e66358275d80ecf647195c3852429252 SHA-256: 789f1a2ca46a52b85fb88c32b6d9ec4f8b840ac2fa82b5a608a83673451a7f0a
154 Risk Score

Malware Insights

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

The PDF contains a link that redirects to malicious infrastructure, likely as part of a phishing or scam campaign. The document body text and embedded URLs suggest a lure related to downloading a song, which is a common tactic for social engineering. The ML classifier strongly indicated maliciousness, and the presence of numerous external links further supports a malicious intent.

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=akhiyan+ne+ronaoy+mp4+song
    • http://files.trinitybillings.org/uploads/1/3/1/8/131856195/vewofarivilab-diravisisuj-mopubojurowub-fezozu.pdf
    • http://legubixe.teamireland.ie/uploads/1/3/0/8/130814328/6a0c326484e590f.pdf
    • http://files.rachaelbangertphotography.com/uploads/1/3/2/6/132681769/fajemavok.pdf
    • http://files.bethanystahl.com/uploads/1/3/2/3/132303041/godebugo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/1569/9621/files/48883886378.pdf
    • https://cdn.shopify.com/s/files/1/0435/5263/7091/files/dofejejusuxibifare.pdf
    • https://cdn.shopify.com/s/files/1/0430/0118/4417/files/pazov.pdf
    • https://cdn.shopify.com/s/files/1/0438/0193/6033/files/39422602740.pdf
    • https://cdn.shopify.com/s/files/1/0438/4181/4693/files/67120493770.pdf
    • https://cdn.shopify.com/s/files/1/0427/5165/6102/files/vosarotatobirotun.pdf
    • https://cdn.shopify.com/s/files/1/0430/2661/2378/files/28905781360.pdf
    • https://cdn.shopify.com/s/files/1/0433/6045/2760/files/2074260976.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000041e9.bin
25dfdc525fd120228535d252f57a431f1cef9fa097435075973ae14f4c1ae0b4
pdf-font-stream PDF embedded font (sfnt) at offset 0x41E9 5444 bytes
font_01_sfnt_off0000544b.bin
a912b9a3725308e161780663ff51076e85aaaf692d18f2607c34b7496b59c2ce
pdf-font-stream PDF embedded font (sfnt) at offset 0x544B 9584 bytes
font_02_sfnt_off00007534.bin
dabf0ccc451caf4864c9b22ca91318a92e8f625b469dd0561edf59b451c7a792
pdf-font-stream PDF embedded font (sfnt) at offset 0x7534 18776 bytes