Malicious PDF — malware analysis report

Static analysis result for SHA-256 62625d6f5dc106d5…

MALICIOUS

PDF

35.7 KB Created: 2020-08-05 23:44:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0ddf0de792e6c758370fb849276fbd5a SHA-1: 7862a74ffa643137da047db0cbc8f3b6f9d14b21 SHA-256: 62625d6f5dc106d5cf2c9cc2b3c3205759b4ca2e141439b5ebb2fe7dc729682b
174 Risk Score

Malware Insights

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

The PDF contains embedded links, with one prominently leading to a malicious redirector at 'https://ttraff.com/pify?keyword=medicinal+chemistry+2+notes+pdf'. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' confirms this. Additionally, the 'SE_CALLBACK_LURE' heuristic suggests a phishing or scam pretext, aiming to trick users into clicking the link. The ML classifier strongly flags this PDF as malicious.

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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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=medicinal+chemistry+2+notes+pdf
    • http://files.rusticchalkdecorshop.com/uploads/1/3/1/0/131070317/4ca0dc7cdf92523.pdf
    • http://files.tiffanyarivera.com/uploads/1/3/0/7/130775229/9181963.pdf
    • http://files.bluemarlin3grancanaria.com/uploads/1/3/0/9/130969545/8278960.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/5229/2513/files/nuriweja.pdf
    • https://cdn.shopify.com/s/files/1/0430/3428/0090/files/satuxijalijep.pdf
    • https://cdn.shopify.com/s/files/1/0431/6607/2994/files/85848966489.pdf
    • https://cdn.shopify.com/s/files/1/0434/2756/1634/files/13013403108.pdf
    • https://cdn.shopify.com/s/files/1/0431/8570/1019/files/92255524386.pdf
    • https://cdn.shopify.com/s/files/1/0428/1335/8247/files/85908711135.pdf
    • https://cdn.shopify.com/s/files/1/0432/2669/3789/files/67440503132.pdf
    • https://cdn.shopify.com/s/files/1/0435/2396/5079/files/dugufakimo.pdf
    • https://cdn.shopify.com/s/files/1/0433/6333/6350/files/litumobepemenosalezazivim.pdf
    • https://cdn.shopify.com/s/files/1/0447/5171/6503/files/tell_me_about_yourself_example.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_off00004c88.bin
9b428e8ef7983e10379c6ff2c32e88175c2c8515515c449fe181a86177f5a21a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4C88 5636 bytes
font_01_sfnt_off00005f9c.bin
4e9549a0412de8d1ed82aa1ea1fafe404d8d349e6c1d4ec326a7f182416a00ca		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F9C 10132 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.