Malicious PDF — malware analysis report

Static analysis result for SHA-256 11e8c622e7b8a73e…

MALICIOUS

PDF

45.8 KB Created: 2020-07-29 06:11:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cea0d0a5e38e2492d16144a1b0d5bf49 SHA-1: dd3eece9eb2a75ca5480445a0acdb4a5bc239a9c SHA-256: 11e8c622e7b8a73edbd3f904dc5239b5c8a4b480d707e6df8b5107f1d373d12e
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, suggests a lure related to movie downloads, which is a common tactic for phishing or malware distribution. The ML classifier strongly indicated maliciousness, supporting the assessment of a phishing or redirection attack.

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=the+babysitter+movie++in+dual+audio
    • http://files.canyonlakevillas.com/uploads/1/3/1/1/131164113/2378225.pdf
    • http://files.sabasphotography.com/uploads/1/3/0/8/130873794/xuritudu.pdf
    • http://files.tiftcountysoccer.com/uploads/1/3/1/3/131383467/1b8b0b52a.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/7199/5033/files/27851467414.pdf
    • https://cdn.shopify.com/s/files/1/0429/6779/3817/files/17257445666.pdf
    • https://cdn.shopify.com/s/files/1/0431/1629/8393/files/venules.pdf
    • https://cdn.shopify.com/s/files/1/0438/5511/8501/files/jinesixa.pdf
    • https://cdn.shopify.com/s/files/1/0431/6381/2002/files/poxixuwikoxe.pdf
    • https://cdn.shopify.com/s/files/1/0429/3397/7255/files/56628340898.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/80789229335.pdf
    • https://cdn.shopify.com/s/files/1/0437/5108/0090/files/buxofuxomikeg.pdf
    • https://cdn.shopify.com/s/files/1/0432/0693/4688/files/fanegu.pdf
    • https://cdn.shopify.com/s/files/1/0431/4421/6727/files/tigutarobibopabod.pdf
    • https://cdn.shopify.com/s/files/1/0432/8180/9558/files/35194147167.pdf
    • https://cdn.shopify.com/s/files/1/0430/6924/3549/files/bikifitigigusasusojugotor.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_off000076b9.bin
0570a3efe63e7b73a8c68682045335cfd63d930b6a5097a6725868d4784dbb8c
pdf-font-stream PDF embedded font (sfnt) at offset 0x76B9 5196 bytes
font_01_sfnt_off0000883d.bin
169d6bfef01eeba85c314d79c0c1aaef257f8d6f67b3ee66116740269c7fd9c6
pdf-font-stream PDF embedded font (sfnt) at offset 0x883D 9888 bytes