Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a1aff558627dfbb…

MALICIOUS

PDF

42.0 KB Created: 2020-08-23 10:31:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 85f99e4ed608e2a745d48c9c60fa6bba SHA-1: ad7bc7adefa7867a57780470a1f0f52560d33a39 SHA-256: 0a1aff558627dfbb00bb8390a0556f5fcb4edc30749298feb892e8bcc427787b
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, which is likely used to obscure the final destination of the malicious content. The document body, though heavily obfuscated, contains references to a 'cover video' and includes the malicious URL, suggesting a lure for phishing or malware delivery. The presence of numerous external PDF links, many pointing to Shopify, further indicates a link farm or content distribution network used to host malicious files.

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=amablesser+cover+video
    • http://files.keckmanagementroofing.com/uploads/1/3/1/4/131406348/mejivap_farex.pdf
    • http://files.nottinghamorthodox.org.uk/uploads/1/3/1/3/131384436/veromedaxupawokik.pdf
    • http://zoziwi.ignite-the-change.com/uploads/1/3/1/3/131384281/lizad.pdf
    • http://sitokazes.craig-thomson.co.uk/uploads/1/3/1/8/131857140/4372009.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0427/9985/7823/files/xinifoximanukawofifer.pdf
    • https://cdn.shopify.com/s/files/1/0432/6224/7067/files/98440612793.pdf
    • https://cdn.shopify.com/s/files/1/0433/7690/2309/files/blink_malcolm_gladwell_book.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/9467339244.pdf
    • https://cdn.shopify.com/s/files/1/0431/9536/7585/files/56244894904.pdf
    • https://cdn.shopify.com/s/files/1/0435/8275/0881/files/40856887740.pdf
    • https://cdn.shopify.com/s/files/1/0433/9643/2021/files/96894244988.pdf
    • https://cdn.shopify.com/s/files/1/0431/5892/9570/files/97829522288.pdf
    • https://cdn.shopify.com/s/files/1/0446/6973/0979/files/allopathic_medicine_guide_book.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005990.bin
7f1ca6254148017817e3637b35aed1dbdfa60cd68172f34083f98b83c97b4ed5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5990 4876 bytes
font_01_sfnt_off00006a14.bin
7d6118321a7a30ea68ac1e8053abf1490d4316e7dd8dbed635a7b695fb6d8c6e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A14 10304 bytes
font_02_sfnt_off00008d4d.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8D4D 4324 bytes

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