Malicious PDF — malware analysis report

Static analysis result for SHA-256 73c772fd4c73853c…

MALICIOUS

PDF

97.8 KB Created: 2020-08-25 03:43:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fc65ef6a61b44f719df248001f0f1f6a SHA-1: f6d9bf6f7d611d05b1ccc79fe4c73418e945c37f SHA-256: 73c772fd4c73853c0c42144227ddfb09468413c27c7107741cd93cfe0a3c49ee
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic identifying a link to a known malicious redirector infrastructure at 'https://ttraff.com/pify?keyword=tuning+pid+controller+pdf'. The document body, though heavily obfuscated, also contains this URL, suggesting a phishing or scam attempt. The presence of many external PDF links further indicates a link farm used for SEO manipulation or to distribute 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.com/pify?keyword=tuning+pid+controller+pdf
    • http://files.joshyblog.com/uploads/1/3/2/3/132303219/wukefas.pdf
    • http://files.pricevillefire.com/uploads/1/3/2/6/132695932/bde8b87b16f0.pdf
    • http://files.mactire.ie/uploads/1/3/2/6/132695190/2766841.pdf
    • http://files.donnaclarkteacherportfolio.com/uploads/1/3/2/6/132683181/ed5ef0f609fad56.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/5048/4390/files/calendario_di_serie_a_2020_19.pdf
    • https://cdn.shopify.com/s/files/1/0428/2531/8563/files/5171452226.pdf
    • https://cdn.shopify.com/s/files/1/0430/1455/3763/files/6434236562.pdf
    • https://cdn.shopify.com/s/files/1/0429/2804/6233/files/93131195275.pdf
    • https://cdn.shopify.com/s/files/1/0437/2614/3639/files/logufolupew.pdf
    • https://cdn.shopify.com/s/files/1/0436/4900/7769/files/75023377126.pdf
    • https://cdn.shopify.com/s/files/1/0450/6225/8851/files/elementary_book.pdf
    • https://cdn.shopify.com/s/files/1/0437/3017/4101/files/partnership_firm_agreement_format.pdf
    • https://cdn.shopify.com/s/files/1/0431/2665/3077/files/13926374521.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012382.bin
9817dc2c99ae234f39bb1a455970b6e20f3606616167a69a84ad922c500b3402		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12382 4884 bytes
font_01_sfnt_off00013428.bin
caf63edb0287f368c59c8b3d5e51827614052e7435abf377561be5195466f98c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13428 15320 bytes
font_02_sfnt_off00016534.bin
e519f4e4ac6d9b0f57dce0c0d49b484e4d1d842646fa75230b4829220ba81c73		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16534 16140 bytes

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