Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e0fe97fb911c580…

MALICIOUS

PDF

44.2 KB Created: 2020-08-08 17:50:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 086e0b96ef42f6b34c0080b077109d7c SHA-1: 23f865b5d5916fce926fe6a7379b4247841d60e9 SHA-256: 9e0fe97fb911c5809511d47e57f5d39dd27c4f1ff03c9df9f8358cd568ce8e73
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged as malicious due to the presence of links pointing to known malicious redirector infrastructure. It also contains a large number of external PDF links, many hosted on Shopify, suggesting a link farm or SEO manipulation tactic. The ML classifier strongly supports the malicious verdict. No scripts were extracted, and the document body is heavily obfuscated, making it difficult to determine the exact payload or user-facing lure.

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=thenar+eminence+exercises+pdf
    • http://files.elcinepr.com/uploads/1/3/1/3/131381414/jamemusubemotafubu.pdf
    • http://files.artmatterscommunitystudiogallery.com/uploads/1/3/1/0/131070771/dd3ec824.pdf
    • http://files.pantoffelkinovideo.com/uploads/1/3/1/3/131378990/fafefaza.pdf
    • http://files.michaelwarrenmurphy.net/uploads/1/3/1/4/131454012/regezewowif-wofenur-puvuvinaveloxi-vugim.pdf
    • http://files.cleanteamprestwich.org/uploads/1/3/1/8/131871644/fezabon-vefija.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gidawibozifuniji.pdf
    • https://cdn.shopify.com/s/files/1/0435/7675/4344/files/49135223027.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/guwesimutetalajizobanubel.pdf
    • https://cdn.shopify.com/s/files/1/0437/8073/5138/files/convert_to_word_using_adobe_pro.pdf
    • https://cdn.shopify.com/s/files/1/0433/4911/5029/files/kipugasujat.pdf
    • https://cdn.shopify.com/s/files/1/0430/6911/2474/files/multivariate_statistical_analysis_a_conceptual_introduction.pdf
    • https://cdn.shopify.com/s/files/1/0434/1438/8888/files/8732665142.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/20116177671.pdf
    • https://cdn.shopify.com/s/files/1/0428/6749/0975/files/gudopazefovumovovuzoz.pdf
    • https://cdn.shopify.com/s/files/1/0430/0154/4863/files/dafokopexawafenezojomanul.pdf
    • https://cdn.shopify.com/s/files/1/0434/4233/9992/files/72781440890.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/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005eca.bin
8c7d19c5f97f84c488b30f3d1e2415ab561a2bff7dbc97f4405e82db792a7af7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5ECA 6676 bytes
font_01_sfnt_off00006fa0.bin
cd4eeacd395cc013bef19a9aa1151c53d501958f5f4bf48a5cdbd1a5b4384cb6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FA0 5380 bytes
font_02_sfnt_off000081c4.bin
c071c7c7ca7198fbe6dc8fe98b595dda04638f3d564fc223c0d81079766d0bb2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x81C4 9884 bytes

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