Malicious PDF — malware analysis report

Static analysis result for SHA-256 699b5fec881aac02…

MALICIOUS

PDF

47.1 KB Created: 2020-07-28 20:46:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 54d7e4cc5a19aff2eb040422649c425c SHA-1: 3696086fb8629beb6db5f991ff84acf77fa3c5d7 SHA-256: 699b5fec881aac02638191049279cf3d703be8787a3e6b9457ff5e6e5e841e73
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many pointing to link farms and a known malicious redirector. The document body, though heavily obfuscated, suggests a lure related to game cheats, likely intended to drive traffic to malicious sites. The ML classifier strongly indicated maliciousness, and the presence of redirector links confirms a malicious intent to lead users to harmful 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.com/pify?keyword=gta+sa+cheat+menu+cleo+4
    • http://files.greatneckepiscopal.org/uploads/1/3/0/7/130739802/diniwisunone-nugob-xovunux-menof.pdf
    • http://files.jessicaluni.com/uploads/1/3/0/7/130776795/lewakipoxariduwizelu.pdf
    • http://files.ldsdailyscripture.org/uploads/1/3/2/6/132695489/gafizad.pdf
    • http://files.besttoysbyage.com/uploads/1/3/0/7/130739247/164143.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/7303/6697/files/dirulete.pdf
    • https://cdn.shopify.com/s/files/1/0429/6382/8895/files/49695498585.pdf
    • https://cdn.shopify.com/s/files/1/0428/8725/0087/files/36960829333.pdf
    • https://cdn.shopify.com/s/files/1/0433/9341/7367/files/fasenuxazarikiwowixer.pdf
    • https://cdn.shopify.com/s/files/1/0430/7651/8049/files/talinenawilojikomutepe.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/13977390730.pdf
    • https://cdn.shopify.com/s/files/1/0432/6332/8411/files/duguneximefuko.pdf
    • https://cdn.shopify.com/s/files/1/0434/3866/9976/files/29819906550.pdf
    • https://cdn.shopify.com/s/files/1/0432/5857/7046/files/mutaleragivar.pdf
    • https://cdn.shopify.com/s/files/1/0432/5353/0788/files/lunogig.pdf
    • https://cdn.shopify.com/s/files/1/0438/4836/8288/files/jamebejobavigiv.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/movikulewerudazuxedo.pdf
    • https://cdn.shopify.com/s/files/1/0432/8649/5397/files/gizezudesoz.pdf
    • https://cdn.shopify.com/s/files/1/0433/3892/4181/files/rebaxone.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000077c3.bin
fc619b4972b37ddc57cbc12ef0787169e2867d7d91518ecad75d28e9edaf3990		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77C3 4896 bytes
font_01_sfnt_off00008852.bin
2b591eae0e5f2f31401f1faf62153663cc44d1f73611d6b0adb27bfd660597bb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8852 11952 bytes

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