Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ed9c7611a08fc9f…

MALICIOUS

PDF

43.3 KB Created: 2020-08-06 14:51:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 61ecd53bca30c6d9ad88ea0b17d66f72 SHA-1: e07355f92a5847c9647ca2e6fdcd404dd5ce461f SHA-256: 6ed9c7611a08fc9f73c23f94478a0e2ae3c74620bd27f9ab9840a2add1e9abea
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document functions as a link farm, directing users to a known malicious redirector URL. The document body, though partially obfuscated, contains the primary malicious URL and numerous other links, many hosted on Shopify, likely to evade detection. The presence of a password-protected archive lure heuristic suggests an attempt to bypass gateway security by encrypting a payload.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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=fibromialgia+y+s%25C3%25ADndrome+de+fatiga+cr%25C3%25B3nica+pdf
    • http://files.jgfirpo.com/uploads/1/3/1/4/131455275/618364b85a94.pdf
    • http://files.davidfugatecreations.com/uploads/1/3/1/1/131164176/vujubinuxokot-litebinevow.pdf
    • http://files.companychowfoodjunkies.net/uploads/1/3/1/3/131398292/xopixivakor.pdf
    • http://files.beradiantbyrebecca.com/uploads/1/3/1/4/131452733/pubed.pdf
    • http://potavesut.jdrspecialtytackle.com/uploads/1/3/0/7/130775169/312e7def7cf04.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/4757/4943/files/9081226860.pdf
    • https://cdn.shopify.com/s/files/1/0428/1712/6563/files/24753491375.pdf
    • https://cdn.shopify.com/s/files/1/0432/1630/6344/files/21267645688.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/81603963226.pdf
    • https://cdn.shopify.com/s/files/1/0433/3332/0872/files/33717066414.pdf
    • https://cdn.shopify.com/s/files/1/0433/8450/4474/files/tizilujesenamep.pdf
    • https://cdn.shopify.com/s/files/1/0434/8451/2406/files/gunizelixig.pdf
    • https://cdn.shopify.com/s/files/1/0432/9802/9733/files/82365171426.pdf
    • https://cdn.shopify.com/s/files/1/0431/0158/5570/files/gawoperojijijipobumakezu.pdf
    • https://cdn.shopify.com/s/files/1/0430/8549/6469/files/ghost_hunt_manga.pdf
    • https://cdn.shopify.com/s/files/1/0433/4767/3253/files/vinemovo.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_off00006677.bin
ec126bf1a6311888a0326cdbe3d7c5bcf64ace8918d3f81d94c77200eda40943		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6677 5864 bytes
font_01_sfnt_off00007a18.bin
8f4296f23293ed49c5d2b608aaa14890e3d2e9c98c605f8aeaa7d9423be5e8d7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A18 10996 bytes

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