Malicious PDF — malware analysis report

Static analysis result for SHA-256 716d3ee0a4d907ed…

MALICIOUS

PDF

34.0 KB Created: 2020-08-24 05:44:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ec788f9933d61ed6e8b3afad3c0214ec SHA-1: 7a949201d7666cd8f86eef285dc1fd3ca2454a3f SHA-256: 716d3ee0a4d907ed2627ad8e7cb3e34f70a06b36519aa5cc948cb096e3c7f1f5
154 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains text related to a 'Schneider electric circuit breaker datasheet' and includes the malicious URL, suggesting a phishing or scam attempt. The PDF_SEO_LINK_FARM heuristic indicates a large number of external PDF links, 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=schneider+electric+circuit+breaker+datasheet
    • http://files.centralcg.com/uploads/1/3/1/3/131398323/mibojivujipedulive.pdf
    • http://files.psychotherapy121.org/uploads/1/3/2/3/132303068/8131375.pdf
    • http://files.robinsons2malawi.org/uploads/1/3/1/3/131379590/f4e57f3a6590b.pdf
    • http://diximak.fpcroswell.org/uploads/1/3/1/4/131412290/dulibuz.pdf
    • http://xabubapat.magnifydance.org/uploads/1/3/0/7/130775350/nebififose.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/7108/6485/files/kugariliwezixowezu.pdf
    • https://cdn.shopify.com/s/files/1/0438/8762/4344/files/41024400039.pdf
    • https://cdn.shopify.com/s/files/1/0434/1481/4885/files/aphrodite_story.pdf
    • https://cdn.shopify.com/s/files/1/0434/0324/7781/files/endogenous_growth_model.pdf
    • https://cdn.shopify.com/s/files/1/0437/4488/6936/files/franchise_tax_report_california.pdf
    • https://cdn.shopify.com/s/files/1/0430/6993/1673/files/concepts_and_contexts_calculus_4th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0433/8565/1358/files/noxubutiz.pdf
    • https://cdn.shopify.com/s/files/1/0429/6058/4870/files/71380166965.pdf
    • https://cdn.shopify.com/s/files/1/0434/6108/3301/files/kekubofugovesi.pdf
    • https://cdn.shopify.com/s/files/1/0437/0789/1863/files/jizogexifogu.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_off00004912.bin
c22ff78d4e5a7657f2905a136c8b92225a3f4d1e83e3e7f046ee8a0574fae1b3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4912 5332 bytes
font_01_sfnt_off00005b11.bin
c92f694e127269d4f2a07d3a361f2aefee2403e1e987868263f9bb0de7382631		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B11 9292 bytes

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