Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1f54f25d82af1f7…

MALICIOUS

PDF

41.4 KB Created: 2020-08-06 12:18:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0ead5d66f6deeaf22f446b570b0457da SHA-1: 0fd697f62eab36e3895fc147811183d1dabf778b SHA-256: e1f54f25d82af1f760215e5448dbae64721325a6dda32bee1925e98fc3cfb7bc
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains, which is characteristic of a link farm designed to obscure malicious destinations. The primary malicious URL identified is https://ttraff.ru/pify?keyword=the+famous+artist+course+pdf, which is flagged as a redirector to malicious infrastructure. The document body text, though partially corrupted, includes the phrase 'The famous artist course pdf', suggesting a lure to entice users to click the embedded links.

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=the+famous+artist+course+pdf
    • http://files.teachsciencealabama.com/uploads/1/3/1/6/131636678/tazebig_valaner.pdf
    • http://files.eyeholejig.com/uploads/1/3/1/3/131380322/korafaxewofop_womeboliw_vobatijizepo_xosaradoxuno.pdf
    • http://files.pennyfineart.com/uploads/1/3/1/4/131453219/5865204.pdf
    • http://files.melaninandmotherhoodnj.org/uploads/1/3/1/4/131453062/vosidavaxaw.pdf
    • http://files.ourhousecallvet.net/uploads/1/3/1/4/131436967/8028025.pdf
    • https://cdn.shopify.com/s/files/1/0436/4189/7110/files/rifowiliwuzezomalipapivot.pdf
    • https://cdn.shopify.com/s/files/1/0431/0158/5570/files/pujadapo.pdf
    • https://cdn.shopify.com/s/files/1/0428/8223/6583/files/kenifipavasububuloxeka.pdf
    • https://cdn.shopify.com/s/files/1/0428/8770/8825/files/38193549220.pdf
    • https://cdn.shopify.com/s/files/1/0430/7763/2149/files/tevijiboned.pdf
    • https://cdn.shopify.com/s/files/1/0431/6535/2102/files/how_to_use_chromecast_on_mac.pdf
    • https://cdn.shopify.com/s/files/1/0427/7259/4844/files/58336203073.pdf
    • https://cdn.shopify.com/s/files/1/0436/8944/3483/files/79680877968.pdf
    • https://cdn.shopify.com/s/files/1/0428/2672/7580/files/34220077858.pdf
    • https://cdn.shopify.com/s/files/1/0434/6173/8662/files/shaffer_annular_bop_manual.pdf
    • https://cdn.shopify.com/s/files/1/0448/4258/2176/files/l_amant_marguerite_duras_gratis.pdf
    • https://cdn.shopify.com/s/files/1/0431/6400/8610/files/ludusovugiwimuf.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_off000062c8.bin
4f502713044047c1549567df5a0e24a4150e1e2502c819e8489a8d57a8589ae4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62C8 5312 bytes
font_01_sfnt_off000074ad.bin
417ceb4aca0c4d870329ac2b656bfd5aa6b481babbd3bc18a0ab007d11d1dc67		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74AD 10504 bytes

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