Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ddd2d078a0ee83d…

MALICIOUS

PDF

37.5 KB Created: 2020-08-15 06:26:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6730f3f4bd0e63343df5c448e1713415 SHA-1: f4e69d040976bdcf8f566f0151d79e1e13d4e6aa SHA-256: 6ddd2d078a0ee83d1375fa071cc80aab18eadf616b107130e501189b2381b49a
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one heuristic specifically identifying it as a 'PDF SEO Link Farm' and another flagging a link to known malicious redirector infrastructure. The ML classifier also strongly indicated maliciousness. The embedded URLs suggest an attempt to lure users to external sites, potentially for phishing or to download further malicious content.

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=globoplay+globo+reporter+portugal
    • http://files.lacrl.org/uploads/1/3/1/3/131398242/12a79935858065c.pdf
    • http://fugal.pickleballhouston.com/uploads/1/3/1/4/131453574/videjofuvalivu.pdf
    • http://files.mrmcdaniel17.com/uploads/1/3/1/4/131408353/9c468fa00e464.pdf
    • http://files.bobartdawson.com/uploads/1/3/2/7/132740214/fodewodajibug_kataroso_nuxosaxedak_medog.pdf
    • http://files.debaerelab.com/uploads/1/3/0/7/130739387/lilonasojokun_jodetonoj_bujetix_lonijuxonif.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/9373/7118/files/developing_critical_and_creative_thinking_skills.pdf
    • https://cdn.shopify.com/s/files/1/0430/1363/6259/files/vavurerezesorelu.pdf
    • https://cdn.shopify.com/s/files/1/0433/2912/6550/files/mebuxujasosenised.pdf
    • https://cdn.shopify.com/s/files/1/0439/9972/3678/files/download_english_to_urdu_dictionary_in_format.pdf
    • https://cdn.shopify.com/s/files/1/0431/4352/8609/files/pumepum.pdf
    • https://cdn.shopify.com/s/files/1/0430/3110/1603/files/46770169913.pdf
    • https://cdn.shopify.com/s/files/1/0435/1767/3636/files/mastering_the_market_cycle.pdf
    • https://cdn.shopify.com/s/files/1/0439/9369/4366/files/54701564088.pdf
    • https://cdn.shopify.com/s/files/1/0430/2359/7725/files/13782151542.pdf
    • https://cdn.shopify.com/s/files/1/0438/2218/6656/files/zinuxeko.pdf
    • https://cdn.shopify.com/s/files/1/0431/7646/0447/files/schneider_building_management_system.pdf
    • https://cdn.shopify.com/s/files/1/0438/1258/5634/files/godadujigo.pdf
    • https://cdn.shopify.com/s/files/1/0430/1560/2337/files/82390355159.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_off00004b3a.bin
d7d013408685d1bf1dc1dee1d90893ea0daaa0e4e5db9584292ef4d00e01cff0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4B3A 3304 bytes
font_01_sfnt_off0000571e.bin
9bfcdf4eadc9830bbe2fd89828fc6b8fe795994c101dc5b8495bf3b69af38778		 pdf-font-stream PDF embedded font (sfnt) at offset 0x571E 5080 bytes
font_02_sfnt_off0000687d.bin
404ac0b8475458caf28c77dbbee61435599caa46b84b8e526fa64122ef8b3c43		 pdf-font-stream PDF embedded font (sfnt) at offset 0x687D 9364 bytes

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