Malicious PDF — malware analysis report

Static analysis result for SHA-256 29c63b770fa927f5…

MALICIOUS

PDF

40.6 KB Created: 2020-08-12 19:56:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ddb94641cd775ef084c319827ee58aa3 SHA-1: b406e7a280590d4e571f73090d2f8a91909cf5ee SHA-256: 29c63b770fa927f5f84e144c5766936c06106c6e3569ee7bc2536247a3a5797d
152 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, a technique often used to obscure malicious destinations. The primary malicious URL, 'https://ttraff.cc/pify?keyword=alimentos+hierro+pdf', is identified as a redirector. The majority of the other links point to a link farm hosted on Shopify, which is a common tactic to improve search engine ranking and distribute malicious content. No scripts were extracted, but the structure and embedded links strongly suggest a phishing or 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.cc/pify?keyword=alimentos+hierro+pdf
    • http://redosalo.danieldejean.com/uploads/1/3/1/3/131383791/zeposuzonedesojuxis.pdf
    • http://powetokum.peacockmosaics.co.uk/uploads/1/3/0/9/130969090/finimukeku.pdf
    • http://wixip.hairbyminsun.com/uploads/1/3/1/4/131453133/muzodilijenujixanem.pdf
    • http://pimer.swcsdcareertech.com/uploads/1/3/1/8/131856772/dovisotepuj_vobupelurisixa.pdf
    • http://files.cgpto.org/uploads/1/3/1/8/131871963/pulivuj.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nunirisolifugonogebivaxez.pdf
    • https://cdn.shopify.com/s/files/1/0429/7729/6543/files/fumusufenoz.pdf
    • https://cdn.shopify.com/s/files/1/0436/5461/1102/files/antimicrobial_drugs_classification.pdf
    • https://cdn.shopify.com/s/files/1/0429/8991/2218/files/79605200985.pdf
    • https://cdn.shopify.com/s/files/1/0455/7688/0293/files/book_for_learning_guitar.pdf
    • https://cdn.shopify.com/s/files/1/0431/5571/8298/files/kujisanab.pdf
    • https://cdn.shopify.com/s/files/1/0447/9533/0717/files/eastern_shore_craigslist.pdf
    • https://cdn.shopify.com/s/files/1/0434/7081/5397/files/48904518695.pdf
    • https://cdn.shopify.com/s/files/1/0430/8389/0850/files/r134a_refrigerant_capacity_guide.pdf
    • https://cdn.shopify.com/s/files/1/0431/8042/5370/files/79659462494.pdf
    • https://cdn.shopify.com/s/files/1/0436/7240/4118/files/gufujaxodi.pdf
    • https://cdn.shopify.com/s/files/1/0435/1872/2216/files/the_quick_brown_fox_test.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_off0000605f.bin
179ebc1477afac8d7cd06bb6d25a6cdab73a558107ca06800152cf368bb2c2b9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x605F 5060 bytes
font_01_sfnt_off00007168.bin
11dd526388112c6d70410760ef8549447fd9663f8bc8ab260ca94f9fe6f93f50		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7168 10680 bytes

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