Malicious PDF — malware analysis report

Static analysis result for SHA-256 164f03275202b721…

MALICIOUS

PDF

43.1 KB Created: 2020-08-03 05:48:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 23914da8e325d9337991432c19a133a1 SHA-1: 69f0a0d34a631d1344a8820dd5dc0643ec5ac4e0 SHA-256: 164f03275202b72146dc75dab2c9889ea60d1636f4828908f0f74854b02b4b63
154 Risk Score

Malware Insights

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

The PDF contains a link to a redirector URL that is flagged as malicious, suggesting a phishing or scam attempt. The document body, though heavily obfuscated, contains the same URL and appears to be a lure for a user manual. The presence of numerous links to external PDFs, many hosted on Shopify, indicates a link farm, likely for SEO manipulation or to host further malicious content.

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.ru/pify?keyword=whirlpool+wrx735sdbm00+manual
    • http://files.theprairiegroup.org/uploads/1/3/2/6/132682861/xafevimaveli.pdf
    • http://files.brykayne.com/uploads/1/3/1/4/131406288/3301171.pdf
    • http://files.powsfsu.org/uploads/1/3/2/6/132695601/4443856.pdf
    • http://files.charleysincorporation.com/uploads/1/3/2/6/132682640/7825133.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0434/4732/0728/files/97143475763.pdf
    • https://cdn.shopify.com/s/files/1/0430/2848/0157/files/89329398869.pdf
    • https://cdn.shopify.com/s/files/1/0429/6137/1290/files/laranadokejof.pdf
    • https://cdn.shopify.com/s/files/1/0427/9812/1119/files/kekusajagizirofajokar.pdf
    • https://cdn.shopify.com/s/files/1/0431/2511/2994/files/95925679599.pdf
    • https://cdn.shopify.com/s/files/1/0430/9575/2864/files/dajenunivinolejejoxo.pdf
    • https://cdn.shopify.com/s/files/1/0431/6977/5782/files/49434037146.pdf
    • https://cdn.shopify.com/s/files/1/0433/5730/7039/files/rozalovonefafaterulo.pdf
    • https://cdn.shopify.com/s/files/1/0435/5981/3279/files/672115046.pdf
    • https://cdn.shopify.com/s/files/1/0437/3449/9493/files/zojid.pdf
    • https://cdn.shopify.com/s/files/1/0433/5462/0059/files/adobe_flash_player_for_android.pdf
    • https://cdn.shopify.com/s/files/1/0431/7691/9194/files/visegowi.pdf
    • https://cdn.shopify.com/s/files/1/0432/1977/9741/files/essential_calculus_james_stewart.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_off0000590e.bin
1c5518bf16a93a91c1d72164caba56202290c3ac24de8be0e6768a25ad09e46f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x590E 5708 bytes
font_01_sfnt_off00006c50.bin
f0e0549a5253b23076be1ee3b4ee394442441ee4e857ccfe9fbd777a4b77acf7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C50 10976 bytes
font_02_sfnt_off000090d6.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230		 pdf-font-stream PDF embedded font (sfnt) at offset 0x90D6 4324 bytes

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