Malicious PDF — malware analysis report

Static analysis result for SHA-256 07479b52639cf7c9…

MALICIOUS

PDF

58.9 KB Created: 2020-07-28 22:02:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2d3f5c37a19b5367282dddf8190d8396 SHA-1: c49a3d819c3923478889d707090df52581ec523b SHA-256: 07479b52639cf7c9e01433f20ba6f89b0587e8771b60ae3de2f961adfda1621d
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, specifically identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, suggests a lure related to 'Melbourne cup tips and form guide'. The presence of numerous external PDF links also indicates a link farm strategy, likely to obscure the malicious redirector.

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=melbourne+cup+tips+and+form+guide
    • http://files.marypurdy.com/uploads/1/3/2/7/132740620/pojuxibukiwum.pdf
    • http://files.lincolnfencecontractors.com/uploads/1/3/2/6/132681938/7c5f525598fb.pdf
    • http://files.reikiwomb.com/uploads/1/3/1/4/131453535/6fa7393adb90.pdf
    • http://files.markkrawczykactor.com/uploads/1/3/0/7/130739227/2291146.pdf
    • http://files.resistlaboratory.com/uploads/1/3/1/0/131071137/savemefejo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/0485/3402/files/terizevibamagu.pdf
    • https://cdn.shopify.com/s/files/1/0428/6195/3191/files/pegikegotogepisarevajarej.pdf
    • https://cdn.shopify.com/s/files/1/0430/1373/4563/files/pinetuxutunirofuxebesoloz.pdf
    • https://cdn.shopify.com/s/files/1/0431/9775/9643/files/zawopipojak.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/pajakeveposemilakojataza.pdf
    • https://cdn.shopify.com/s/files/1/0431/6892/3799/files/71962585871.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/80789229335.pdf
    • https://cdn.shopify.com/s/files/1/0429/5491/5993/files/12168471784.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/puxatofutedixa.pdf
    • https://cdn.shopify.com/s/files/1/0437/2430/8630/files/97841022407.pdf
    • https://cdn.shopify.com/s/files/1/0438/3748/9309/files/zegufo.pdf
    • https://cdn.shopify.com/s/files/1/0435/1442/9608/files/95718456578.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_off0000a7d9.bin
b172a606d5dedc29e83eb3d37947117c64f2ba44cfd986b1f29923cdced42157		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA7D9 5504 bytes
font_01_sfnt_off0000ba74.bin
153f08e3e781c7012940ae675b2d737582ce5f057a6fe7d263dff79db93ccca6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBA74 10408 bytes

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