Malicious PDF — malware analysis report

Static analysis result for SHA-256 10dce0a361f5f622…

MALICIOUS

PDF

63.3 KB Created: 2020-08-14 00:50:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d241dd4536f3f68f891a21e5096a6eb6 SHA-1: f79f76be6411a33b82d7b33eaac0cba0e8f80eee SHA-256: 10dce0a361f5f622c1f830ed10a15d45ba2427454c5d705d6c10ce1e74466438
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 benign Shopify URLs, but one critical link directs to a known malicious redirector. The document body, though heavily obfuscated, contains the target URL, suggesting a lure to a malicious site disguised as a radiology report. No scripts were extracted, but the presence of a malicious redirector indicates an attempt to lead the user to a malicious payload or phishing page.

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=spondylolisthesis+radiology+report
    • http://nidiritif.seymourwildlife.com/uploads/1/3/0/8/130874253/5393808.pdf
    • http://files.cdn.bassassassin.com/uploads/1/3/1/3/131379343/134d5fed3104a1.pdf
    • http://files.dburbancommunities.com/uploads/1/3/1/3/131380299/boxukafus-nivixamol.pdf
    • http://files.phillyiday.org/uploads/1/3/1/6/131607712/lijipajosuvekizuga.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0436/2013/9170/files/12687650241.pdf
    • https://cdn.shopify.com/s/files/1/0434/1402/8444/files/32810161628.pdf
    • https://cdn.shopify.com/s/files/1/0438/9522/6523/files/the_replacements_disney.pdf
    • https://cdn.shopify.com/s/files/1/0454/2916/2152/files/kogolof.pdf
    • https://cdn.shopify.com/s/files/1/0430/8841/2836/files/jokisudex.pdf
    • https://cdn.shopify.com/s/files/1/0428/2135/3635/files/presente_simple_en_ingles_ejemplos.pdf
    • https://cdn.shopify.com/s/files/1/0444/0319/6070/files/how_to_change_hud_color_elite_dangerous.pdf
    • https://cdn.shopify.com/s/files/1/0434/1766/5703/files/xomufunazu.pdf
    • https://cdn.shopify.com/s/files/1/0436/0945/6803/files/79354221961.pdf
    • https://cdn.shopify.com/s/files/1/0432/5831/4912/files/79890542195.pdf
    • https://cdn.shopify.com/s/files/1/0434/5852/7397/files/bodybuilding_workout_photos.pdf
    • https://cdn.shopify.com/s/files/1/0433/0671/3253/files/tunavawifalaxojifunudi.pdf
    • https://cdn.shopify.com/s/files/1/0435/2232/6696/files/nolitubepew.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_off0000ba9e.bin
9d64639586427345f74eae589f618eabaeccf47bb40c00df09bfedfdc16e6e45		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBA9E 5424 bytes
font_01_sfnt_off0000cd08.bin
ffa23243fd6fc2823f46caa335176d410cba8220ff090ce06d6af7676d5a9f21		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCD08 10376 bytes

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