Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ee47530ed365484…

MALICIOUS

PDF

55.3 KB Created: 2020-08-11 13:41:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 78b7a20e3ee3a817ff845afe4d7e2547 SHA-1: daf92d41145a6dcd755e139a14a2f89e643a55cb SHA-256: 5ee47530ed365484c9fafb31768ef2fbb3cc4f877cb3382c85c31baaea63bbfa
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, with one identified as a malicious redirector. The document body, though partially corrupted, suggests a lure related to 'Adobe analytics tutorial pdf'. The presence of a large number of external links, many pointing to Shopify domains, indicates a link farm designed to distribute malicious content or conduct phishing. The ML classifier strongly flagged this PDF as malicious.

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.cc/pify?keyword=adobe+analytics+tutorial+pdf
    • http://files.sarahulan.com/uploads/1/3/1/4/131437685/bifol.pdf
    • http://sipela.dermatagespa.com/uploads/1/3/1/1/131164239/64be492c2e455.pdf
    • http://vemadiri.gcriverafoundation.org/uploads/1/3/2/3/132303382/1841648.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/6314/8706/files/xavufuvopasujetegugevo.pdf
    • https://cdn.shopify.com/s/files/1/0440/2734/7109/files/82083464338.pdf
    • https://cdn.shopify.com/s/files/1/0430/7222/5442/files/49734832498.pdf
    • https://cdn.shopify.com/s/files/1/0432/6991/4782/files/83395308769.pdf
    • https://cdn.shopify.com/s/files/1/0434/3277/1750/files/vulematinigifobidifej.pdf
    • https://cdn.shopify.com/s/files/1/0433/7968/7574/files/malozod.pdf
    • https://cdn.shopify.com/s/files/1/0434/6498/2693/files/34495282863.pdf
    • https://cdn.shopify.com/s/files/1/0433/4741/1096/files/sizonibujezatoziwewav.pdf
    • https://cdn.shopify.com/s/files/1/0437/4419/8805/files/zobogobunejokiwezakizova.pdf
    • https://cdn.shopify.com/s/files/1/0433/2650/5118/files/69749383766.pdf
    • https://cdn.shopify.com/s/files/1/0428/8030/3270/files/muzebijegigesut.pdf
    • https://cdn.shopify.com/s/files/1/0431/4005/5208/files/pradeep_a_textbook_of_biology_for_class_11.pdf
    • https://cdn.shopify.com/s/files/1/0431/5345/7320/files/18453035341.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_off000099f0.bin
b866ee9e36ad24cb96004b6d794c35a07b1b2a08924749666944d293c80dde2a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x99F0 5380 bytes
font_01_sfnt_off0000ac50.bin
39837b77da7084d3b4e1a4ddc3ab81881780029d4ddde730c2062e19e8b25814		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAC50 10584 bytes

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