Malicious PDF — malware analysis report

Static analysis result for SHA-256 04ffbd595b40f966…

MALICIOUS

PDF

47.0 KB Created: 2020-08-13 22:22:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d15a2d59988a12cc97b3a295982098fd SHA-1: 48690537376e7158e5c2681eb2198c47e3bfee14 SHA-256: 04ffbd595b40f966fa7b5e153fef811345fa1f765f151aa68f48bd1f0849384d
194 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, with one identified as a known malicious redirector. The ML classifier also flagged this PDF as malicious. The presence of numerous links suggests an attempt to distribute malicious content or engage in SEO spam, potentially leading to further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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.ru/pify?keyword=aeolian+process+and+landform
    • http://files.breedingforthefuture.com/uploads/1/3/2/6/132681566/sutavumuz.pdf
    • http://files.worldnativity.com/uploads/1/3/0/8/130873997/2e4ae55435f6f.pdf
    • http://kubifim.blissbeautybasement.com/uploads/1/3/1/6/131637814/jiwoxikifipiga-bulerapuj-gepagazigu.pdf
    • http://files.thecurlings.net/uploads/1/3/0/8/130814531/1134235.pdf
    • http://files.myartisticdentist.com/uploads/1/3/0/8/130874246/xanosir_zawosolevotu_naburu_gijorajokozuwap.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0432/1568/3744/files/12722835585.pdf
    • https://cdn.shopify.com/s/files/1/0445/4963/6255/files/50672998835.pdf
    • https://cdn.shopify.com/s/files/1/0435/9120/5021/files/51974917813.pdf
    • https://cdn.shopify.com/s/files/1/0431/1806/7876/files/65010760046.pdf
    • https://cdn.shopify.com/s/files/1/0432/3495/1331/files/les_accents_regles.pdf
    • https://cdn.shopify.com/s/files/1/0435/3989/0327/files/polerinumuxido.pdf
    • https://cdn.shopify.com/s/files/1/0428/2158/3004/files/mastercam_x8_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0433/4059/5352/files/45360447123.pdf
    • https://cdn.shopify.com/s/files/1/0432/7315/8806/files/31049265795.pdf
    • https://cdn.shopify.com/s/files/1/0431/0378/1015/files/fijaluzafuvesupufig.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_off00006f5d.bin
370b88f329cb152e41982827a2be33e37536c096709999076b1986c24390cd15		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F5D 5000 bytes
font_01_sfnt_off00008031.bin
96c80c4a035b3384e1633c83ed8f8989b5335e5306ae03a61bf60adc50d52618		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8031 9688 bytes
font_02_sfnt_off0000a14c.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA14C 4324 bytes

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