Malicious PDF — malware analysis report

Static analysis result for SHA-256 702f38640ecb997a…

MALICIOUS

PDF

46.8 KB Created: 2020-08-08 06:08:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 30dcc3e64f2ec6d481d4f98428e7daf2 SHA-1: 1e5cb55c44cb0995b36dcbd0a303900836fd4519 SHA-256: 702f38640ecb997a5df81555841617ce61b6bf8fe6aa6f69f3f6d48a4657354a
154 Risk Score

Malware Insights

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

The PDF contains a large number of external links, including one pointing to a known malicious redirector at 'ttraff.com'. The document body, though partially corrupted, contains text suggesting a lure related to a 'cover letter for system administrator'. The presence of numerous PDF links indicates a link farm strategy, likely to obscure the malicious destination or distribute malicious content. No scripts were extracted, but the overall structure and link analysis strongly suggest a phishing or malware distribution attempt.

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=cover+letter+for+system+administrator+pdf
    • http://ravesepa.claireallegrataylor.com/uploads/1/3/1/4/131406893/8646902.pdf
    • http://files.chardoncommunityactionteam.org/uploads/1/3/1/3/131384018/pugotut-newifuniz.pdf
    • http://files.pbadesigngroup.com/uploads/1/3/1/4/131437724/fulizuzibepi_felularopi_gizuburokir.pdf
    • http://files.newdurhamschool.org/uploads/1/3/1/4/131453907/rekut-xabuwuz-rukokigiwu-tewidofafoma.pdf
    • http://files.artbylucymott.studio/uploads/1/3/1/3/131384281/berugod.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0432/9888/1704/files/fodubugogigumabarejejak.pdf
    • https://cdn.shopify.com/s/files/1/0431/4818/1666/files/36331098459.pdf
    • https://cdn.shopify.com/s/files/1/0431/2858/6402/files/xubirizasinazalufozu.pdf
    • https://cdn.shopify.com/s/files/1/0434/1733/8005/files/rilumolig.pdf
    • https://cdn.shopify.com/s/files/1/0433/9469/5318/files/69542860123.pdf
    • https://cdn.shopify.com/s/files/1/0431/6761/3082/files/treasure_bruno_mars.pdf
    • https://cdn.shopify.com/s/files/1/0429/0071/7727/files/dajiwutetulutejulu.pdf
    • https://cdn.shopify.com/s/files/1/0440/8298/7158/files/penelib.pdf
    • https://cdn.shopify.com/s/files/1/0430/1488/1433/files/tutaserisukogosod.pdf
    • https://cdn.shopify.com/s/files/1/0433/3184/6296/files/97488877012.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006aab.bin
6f1dc924b8cd0f727b8f250f6a08b04a4345eea39e9c884b0be53af3c8922640		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6AAB 5160 bytes
font_01_sfnt_off00007c32.bin
e1652286fe1a13d052ef73abf84e382e06cec0965a24eb8db8406b63e011a924		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C32 10448 bytes
font_02_sfnt_off00009fdd.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9FDD 4324 bytes

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