Malicious PDF — malware analysis report

Static analysis result for SHA-256 303d956c2cbee9f8…

MALICIOUS

PDF

42.0 KB Created: 2020-08-17 01:39:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 325aa233fbe24d585cde9a5b6a843334 SHA-1: 303055268580d743e0e9699c1d53f3b3f014c742 SHA-256: 303d956c2cbee9f8d5c17a4caa857340fe7211d73b71abe477b566078cfcb954
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating it links to known malicious redirector infrastructure, specifically 'https://ttraff.com/pify?keyword=slicing+3d+shapes+worksheet+pdf'. Additionally, it features a large number of external PDF links, a common tactic for SEO manipulation or distributing further malicious content. The ML classifier also strongly flagged this PDF as malicious.

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.com/pify?keyword=slicing+3d+shapes+worksheet+pdf
    • http://files.msandtherapist.com/uploads/1/3/2/7/132710763/teseboraposil_bukoregudakag_gexegawul_zaxulowubo.pdf
    • http://files.leilaspaws.com/uploads/1/3/2/8/132815172/8a8938c.pdf
    • http://bipirig.theroseandthethorn.com.au/uploads/1/3/1/3/131383708/6775653.pdf
    • http://files.warerivernatureclub.org/uploads/1/3/1/4/131453598/9793680.pdf
    • http://dupazotaf.momentumdanceandfit.com/uploads/1/3/2/6/132681352/siligu.pdf
    • https://cdn.shopify.com/s/files/1/0431/5637/3659/files/rejorilisetod.pdf
    • https://cdn.shopify.com/s/files/1/0434/1828/8284/files/business_budget_template.pdf
    • https://cdn.shopify.com/s/files/1/0429/4855/9004/files/air_torque_pneumatic_actuator.pdf
    • https://cdn.shopify.com/s/files/1/0434/5082/6919/files/24350933370.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/banefidofekadozimodomi.pdf
    • https://cdn.shopify.com/s/files/1/0433/9341/7367/files/jakilafumosikimi.pdf
    • https://cdn.shopify.com/s/files/1/0430/9280/3744/files/laloditazoxomosunujugada.pdf
    • https://cdn.shopify.com/s/files/1/0438/6865/1680/files/close_out_visit_letter_template.pdf
    • https://cdn.shopify.com/s/files/1/0432/2649/7182/files/75339141848.pdf
    • https://cdn.shopify.com/s/files/1/0436/4327/3369/files/budupakagezorupixerek.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/
    • https://cdn.shopify.com/s/files/1/0434/5082

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006590.bin
d78ee1a3a2712e91004281675e69f5f595b567364b986820fe94c927e14df799
pdf-font-stream PDF embedded font (sfnt) at offset 0x6590 5840 bytes
font_01_sfnt_off0000796c.bin
62ebbee1043619a40ffb97ab24e9654610f4044486dc780050b6b605350a95ac
pdf-font-stream PDF embedded font (sfnt) at offset 0x796C 9756 bytes