Malicious PDF — malware analysis report

Static analysis result for SHA-256 dee04f6d68f87511…

MALICIOUS

PDF

35.3 KB Created: 2020-09-01 00:36:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cb7b149e5c32c25ddb4f3816cd09afde SHA-1: c498801a17554eaf420221e7cf8d93985930f58a SHA-256: dee04f6d68f87511c87406d3e4e78d57971c732d81b0c9b2e1096588c9a1bce5
152 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to shopify.com domains, but one critical link redirects to a known malicious domain (ttraff.ru). This indicates a phishing or redirection attempt. The document body contains garbled text along with the malicious URL, suggesting an attempt to obscure the 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.ru/wix?keyword=azhage+azhage+asainthal+song++masstamilan
    • https://cdn.shopify.com/s/files/1/0435/7708/2019/files/occupational_health_hazards_definition.pdf
    • https://cdn.shopify.com/s/files/1/0435/4785/2959/files/1692900004.pdf
    • https://cdn.shopify.com/s/files/1/0437/1388/8424/files/vewekoxugamigizoxe.pdf
    • https://cdn.shopify.com/s/files/1/0434/8100/6246/files/java_sftp_client.pdf
    • https://cdn.shopify.com/s/files/1/0438/3303/2864/files/bedotobixijukajob.pdf
    • https://cdn.shopify.com/s/files/1/0460/2472/0543/files/ejercicios_para_hernia_discal_lumbar.pdf
    • https://cdn.shopify.com/s/files/1/0432/9121/3980/files/ajmer_shatabdi_12015_platform_no.pdf
    • https://cdn.shopify.com/s/files/1/0428/8882/2950/files/historical_timeline_template_google_slides.pdf
    • https://cdn.shopify.com/s/files/1/0439/3641/5899/files/56019667482.pdf
    • https://static.usrfiles.com/ugd/b916f4_29e41b48fc6d4be484782ff4a8fa93da.pdf
    • https://static.usrfiles.com/ugd/784815_f0ac5d93422d405cafbd78d77d2338ac.pdf
    • https://static.usrfiles.com/ugd/162fe6_0aae91155e2c40549405a4a8bdd2297f.pdf
    • https://static.usrfiles.com/ugd/b8c837_41cd3becc36648eb92556877ce68099e.pdf
    • https://cdn.shopify.com/s/files/1/0431/1983/7346/files/kuzevixivutitufemaj.pdf
    • https://cdn.shopify.com/s/files/1/0439/4260/9051/files/gupufinivutugemivov.pdf
    • https://cdn.shopify.com/s/files/1/0430/8343/2096/files/moral_criticism_in_literature.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_off00004c47.bin
35306f0efdde93af0b114f03e7b9e33edd81973b59bcca23847817ea2d362297		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4C47 5040 bytes
font_01_sfnt_off00005d53.bin
1f4a4a0fa8b0fc2dbc00fb89713b91c81247e01b714d1ee5d3c02d2cfeaf6b16		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D53 10628 bytes

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