Malicious PDF — malware analysis report

Static analysis result for SHA-256 32b54710bee2b4f1…

MALICIOUS

PDF

42.3 KB Created: 2020-08-07 22:44:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 136d85e4215f40d337f3fd8a28d0bc73 SHA-1: 2f8b293a7bef5c55f01d5bc172c70f77162fa728 SHA-256: 32b54710bee2b4f1806abd4aac81944059bf0e2f51cc15ead9d5b8afd3ca74ec
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains a large number of embedded links, many of which point to Shopify domains, but one critical link directs to a known malicious redirector at 'ttraff.ru'. This indicates a link farm or SEO poisoning attack designed to redirect users to malicious content. The document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/pify?keyword=checks+and+balances+chart+pdf', reinforcing the malicious redirection attempt.

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.ru/pify?keyword=checks+and+balances+chart+pdf
    • http://files.fetrowphotography.com/uploads/1/3/0/8/130813146/ligufidebituxem-pesofotekuxub.pdf
    • http://mipike.apostolicadventures.com/uploads/1/3/1/6/131607131/5518304.pdf
    • http://files.authenticnutritioncoach.com/uploads/1/3/0/8/130814172/5091151.pdf
    • http://files.jamesebarrguitar.com/uploads/1/3/2/7/132740423/3346697.pdf
    • http://files.pastelsocietyofsoutheasttexas.org/uploads/1/3/1/4/131410234/sozodutodibulajo.pdf
    • https://cdn.shopify.com/s/files/1/0431/2793/1034/files/rumusuxopiwisatototodave.pdf
    • https://cdn.shopify.com/s/files/1/0437/2224/4246/files/31323373353.pdf
    • https://cdn.shopify.com/s/files/1/0434/2883/9586/files/comment_runir_plusieurs_en_un_seul_avec_adobe_reader.pdf
    • https://cdn.shopify.com/s/files/1/0428/5821/7631/files/zikanuluvixetelujakejile.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mipin.pdf
    • https://cdn.shopify.com/s/files/1/0429/0769/7305/files/tibuzuvamikubegugejovu.pdf
    • https://cdn.shopify.com/s/files/1/0430/2507/2282/files/pigotubuxolug.pdf
    • https://cdn.shopify.com/s/files/1/0441/3738/2040/files/xamugazepu.pdf
    • https://cdn.shopify.com/s/files/1/0431/6895/6565/files/riselenorokeforixazifib.pdf
    • https://cdn.shopify.com/s/files/1/0436/2820/0096/files/lapakurorojolowotaw.pdf
    • https://cdn.shopify.com/s/files/1/0437/8384/8097/files/70034420298.pdf
    • https://cdn.shopify.com/s/files/1/0432/3731/0632/files/tebojetawofiloponegufoj.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_off0000655f.bin
08353dd1b26f07f562b5b2cd25d0d9ff566fa308beb81e757263a2f4d2112688		 pdf-font-stream PDF embedded font (sfnt) at offset 0x655F 5352 bytes
font_01_sfnt_off00007780.bin
963ba728aac6765eb7b3afaedb079e5eefda9785a3c4f91d9d0835f54a99e181		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7780 10780 bytes

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