Malicious PDF — malware analysis report

Static analysis result for SHA-256 d036b56b3f0908bd…

MALICIOUS

PDF

51.9 KB Created: 2020-08-03 14:01:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 298af1d4a2ee65a51eec7b3506e6a95f SHA-1: 2dde30acab819a053d31fb7898346b6b5f53b153 SHA-256: d036b56b3f0908bd9b72e9c72904b5ff3bf6f25f16eac5dcb2b046dc0288aa45
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.cc'. The document body, though heavily obfuscated, contains the same URL and references a book title, suggesting a lure. The presence of numerous embedded links, many hosted on Shopify, indicates a link farm designed to obscure the final malicious destination. The ML classifier also strongly flagged this PDF as malicious.

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.cc/pify?keyword=el+libro+rojo+de+carl+jung+pdf
    • http://files.fmvolleyball.com/uploads/1/3/1/4/131453990/koxopopolun-kijujawudogaju.pdf
    • http://files.bingilcg.org/uploads/1/3/1/6/131606208/2907000.pdf
    • http://files.mtalphacycling.org/uploads/1/3/1/4/131437984/fimisiwopilagap_rebokojo_duxezomufotere.pdf
    • http://files.mashath.net/uploads/1/3/0/9/130969548/zurus.pdf
    • https://cdn.shopify.com/s/files/1/0428/7240/6179/files/25625826455.pdf
    • https://cdn.shopify.com/s/files/1/0430/1560/2339/files/jeneragejofuzitefuzeti.pdf
    • https://cdn.shopify.com/s/files/1/0431/2757/0596/files/puxuxadowupix.pdf
    • https://cdn.shopify.com/s/files/1/0430/4538/8442/files/kemolo.pdf
    • https://cdn.shopify.com/s/files/1/0436/4559/9904/files/43297696765.pdf
    • https://cdn.shopify.com/s/files/1/0434/5964/1496/files/nevipogudivasopet.pdf
    • https://cdn.shopify.com/s/files/1/0430/7048/8730/files/86261130885.pdf
    • https://cdn.shopify.com/s/files/1/0429/9754/7157/files/xubarizu.pdf
    • https://cdn.shopify.com/s/files/1/0436/9799/5944/files/bulletproof_web_design.pdf
    • https://cdn.shopify.com/s/files/1/0432/3003/6123/files/85717546242.pdf
    • https://cdn.shopify.com/s/files/1/0433/6756/3418/files/gizesakozexedokirazujan.pdf
    • https://cdn.shopify.com/s/files/1/0430/6668/7639/files/vuvog.pdf
    • https://cdn.shopify.com/s/files/1/0427/7754/2823/files/29795759116.pdf
    • https://cdn.shopify.com/s/files/1/0429/5655/4394/files/8798794469.pdf
    • https://www.facebook.com/culturaylibros
    • 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/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007ab9.bin
5c4d4646434d5d3442dfee236945cae7f414167e6b3503bd88a7d1e561a50591		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7AB9 4804 bytes
font_01_sfnt_off00008b9e.bin
e1f2ef2c2fab325b59292ae951e3339ede63d407d2e2dfe4c344784a4930387f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8B9E 5320 bytes
font_02_sfnt_off00009dc8.bin
e00875d4b34ddd95447cb9b9846d328b0cd7b931586002daceec50077a404971		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9DC8 11216 bytes

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