Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d4fdcd87ab121ec…

MALICIOUS

PDF

62.9 KB Created: 2020-07-30 19:11:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: da380ad9e70092a20f1a0df09cf76cac SHA-1: d5508b4f7b7e45ce45bad0f78fc7d52c533f56d5 SHA-256: 0d4fdcd87ab121ece15eb03b9d9bf66f11aa1c5ed1f3a94b33640c148c7477d6
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to Shopify domains but are likely part of a link farm for SEO manipulation or to host malicious content. One critical heuristic identified a link to a known malicious redirector. The ML classifier strongly indicated maliciousness, and the document body, though obfuscated, suggests a lure related to 'Modern Arabic Poetry'. No scripts were extracted, but the presence of numerous links and the redirector heuristic point to a malicious distribution or redirection scheme.

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=modern+arabic+poetry+an+anthology+pdf
    • http://files.ingitravel.com/uploads/1/3/1/0/131069890/9429705.pdf
    • http://files.studiobeventura.com/uploads/1/3/1/3/131398174/3860763.pdf
    • http://files.blockandboardpdx.com/uploads/1/3/2/6/132683137/c4cc6b.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0427/4293/9814/files/juxisewepug.pdf
    • https://cdn.shopify.com/s/files/1/0431/7950/7872/files/jidijan.pdf
    • https://cdn.shopify.com/s/files/1/0434/4047/2229/files/mixebomiribekazemate.pdf
    • https://cdn.shopify.com/s/files/1/0431/2052/5476/files/bekuk.pdf
    • https://cdn.shopify.com/s/files/1/0436/2718/4281/files/22126145082.pdf
    • https://cdn.shopify.com/s/files/1/0431/5463/6966/files/dinarefolodikes.pdf
    • https://cdn.shopify.com/s/files/1/0431/2373/6725/files/89184771447.pdf
    • https://cdn.shopify.com/s/files/1/0428/3957/2643/files/86015505612.pdf
    • https://cdn.shopify.com/s/files/1/0432/1512/6692/files/12947259900.pdf
    • https://cdn.shopify.com/s/files/1/0429/8784/7843/files/wujibivedekuxozefafe.pdf
    • https://cdn.shopify.com/s/files/1/0431/2478/5313/files/44113435172.pdf
    • https://cdn.shopify.com/s/files/1/0430/8588/9689/files/86706006144.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_off0000b5a9.bin
be9dda5a4b046cf02f2a191fda3fb0a1386a14cbeba27304d4df2dba5eec7bf6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB5A9 5272 bytes
font_01_sfnt_off0000c797.bin
ead7e1e7d87e1a6504de4b5b7ecbdd31f2d681d1c1a09c35d83e9ab9d387a490		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC797 10796 bytes

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