Malicious PDF — malware analysis report

Static analysis result for SHA-256 00b81e9c32eda5e1…

MALICIOUS

PDF

48.4 KB Created: 2020-08-06 05:13:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: eaf87e34d3103562425b1f064c990409 SHA-1: f47a542edf59adaa324ac99d13956f5ac22f2134 SHA-256: 00b81e9c32eda5e1eac11432ac43a9220fef2b473284e09d4ff5992e620b9439
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains numerous embedded links, with a critical heuristic identifying a link to a known malicious redirector at 'https://ttraff.com/pify?keyword=descriptive+quantitative+research+pdf'. The document body, though heavily obfuscated, also contains this URL, suggesting it's the primary lure. The presence of a link farm further indicates an attempt to distribute malicious content or phish users.

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=descriptive+quantitative+research+pdf
    • http://files.wflta.com/uploads/1/3/1/4/131407164/97f5cc0e07d03.pdf
    • http://files.extremeflyerdesigns.com/uploads/1/3/1/3/131382239/364088ecd.pdf
    • http://files.ambleon.net/uploads/1/3/0/8/130814085/1225289.pdf
    • http://files.claudiariverotv.com/uploads/1/3/0/7/130775971/43d1e8ae8.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0431/3320/6690/files/kibasupatuzatisan.pdf
    • https://cdn.shopify.com/s/files/1/0430/8713/4882/files/74311458288.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/fawalonilon.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zikoraj.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rejukimuvili.pdf
    • https://cdn.shopify.com/s/files/1/0439/1596/8667/files/21459064504.pdf
    • https://cdn.shopify.com/s/files/1/0429/7526/4924/files/44770835346.pdf
    • https://cdn.shopify.com/s/files/1/0435/6984/0283/files/79668389576.pdf
    • https://cdn.shopify.com/s/files/1/0432/2803/7287/files/2894978301.pdf
    • https://cdn.shopify.com/s/files/1/0437/9725/0210/files/ffxiv_special_characters.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_off0000728d.bin
d5fa38d005aecdaedd42806cc39bdf61feb574c0bf98282df8eb0b5301e24a6e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x728D 5168 bytes
font_01_sfnt_off0000841f.bin
d5857c8fc095d6efda4ce631aab3ffd27486078b1271886b1fe6352a2ea45604		 pdf-font-stream PDF embedded font (sfnt) at offset 0x841F 9988 bytes
font_02_sfnt_off0000a632.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA632 4324 bytes

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