Malicious PDF — malware analysis report

Static analysis result for SHA-256 b46793cf03f269e2…

MALICIOUS

PDF

39.3 KB Created: 2020-08-15 12:38:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a2744f6c18ffab139a30b9ca7add3f7a SHA-1: 0438c5ce21694604e5ef7da1779fe5aa9cac5302 SHA-256: b46793cf03f269e2ccd27ba3acfbe13c9fe3fd10596f7f9b66618331b7952d7e
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link to a known malicious redirector, ttraff.com, which is designed to lure users to malicious content. The document body, though heavily obfuscated, contains the same keyword as the redirector URL, suggesting a social engineering attempt. The presence of numerous external PDF links, many hosted on Shopify, further indicates a link farm designed to improve SEO for malicious content, ultimately directing users to the malicious redirector.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=learning+english+conversation+for+beginners+pdf
    • http://bemig.mndefenderwear.com/uploads/1/3/1/4/131482823/niwafaf-soduwebuvib.pdf
    • http://files.clarkfamilymed.com/uploads/1/3/2/6/132681772/wotewipuxif-zulebowumovon-luvevegev.pdf
    • http://files.thecouragetogrieve.com/uploads/1/3/2/6/132682471/dimofap-sopojatikopi-misijavut-nuzobiritimin.pdf
    • https://cdn.shopify.com/s/files/1/0429/6110/9155/files/73928733765.pdf
    • https://cdn.shopify.com/s/files/1/0428/6827/7415/files/the_intentional_fallacy.pdf
    • https://cdn.shopify.com/s/files/1/0439/2534/0328/files/wagezenapaguzozoluvut.pdf
    • https://cdn.shopify.com/s/files/1/0431/2930/7293/files/nevunefazomolejebu.pdf
    • https://cdn.shopify.com/s/files/1/0434/8480/7334/files/82700764798.pdf
    • https://cdn.shopify.com/s/files/1/0432/7948/3048/files/mobalo.pdf
    • https://cdn.shopify.com/s/files/1/0431/4054/6721/files/73976276146.pdf
    • https://cdn.shopify.com/s/files/1/0428/4612/6247/files/phonetic_transcription_of_words.pdf
    • https://cdn.shopify.com/s/files/1/0433/7093/8533/files/rabugiwusisemel.pdf
    • https://cdn.shopify.com/s/files/1/0431/6905/4886/files/40838522472.pdf
    • https://cdn.shopify.com/s/files/1/0432/1394/7048/files/dalutegomurotatokisepo.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005a1e.bin
1bf101795d5257ccda072585d09fffb3d14674003be36b6d88ed386062bb75fb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A1E 5560 bytes
font_01_sfnt_off00006cf8.bin
57e81d01bb03f0ff1ec4639e00dd333089a092761da94e10429c1ca134f5a2b0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CF8 10344 bytes

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