Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd6b07ca0995e607…

MALICIOUS

PDF

34.1 KB Created: 2020-08-30 16:25:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2cdde6ebd2a1901a6f2fa671f6668c42 SHA-1: 9510ca1793b1358bce4a8c906a44a667571f41fd SHA-256: bd6b07ca0995e6076a631202d32f999700379201c9416083ddccec96e5df497a
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, a technique often used to create link farms for SEO manipulation or to hide malicious redirects. One prominent URL, 'https://ttraff.com/wix?keyword=warframe+melee+status+mods', is flagged as a malicious redirector. The document body, though heavily obfuscated, contains this URL and other PDF links, reinforcing the link farm attack pattern. No scripts were extracted from this sample.

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/wix?keyword=warframe+melee+status+mods
    • https://static.usrfiles.com/ugd/6cf392_d14c252fa4984007a7b40024793f6911.pdf
    • https://static.usrfiles.com/ugd/d54300_403704cbfbe34420bb9397579d84971d.pdf
    • https://static.usrfiles.com/ugd/74c34a_cc6b6a74b9e04384bd55ed2fd49e0759.pdf
    • https://static.usrfiles.com/ugd/b8c837_0cf667b027d048ed83fedcfa84e3f7d2.pdf
    • https://static.usrfiles.com/ugd/b8c837_0cd9aa6b21b14e98aed75f44e3f86962.pdf
    • https://static.usrfiles.com/ugd/10e3af_1ba8397b05f842728a94414a785b6db6.pdf
    • https://static.usrfiles.com/ugd/ac72e0_ed488bfcd000436da762a7be6f957e84.pdf
    • https://cdn.shopify.com/s/files/1/0434/5335/0055/files/examples_of_asyndeton.pdf
    • https://cdn.shopify.com/s/files/1/0432/0083/9842/files/71751799630.pdf
    • https://cdn.shopify.com/s/files/1/0431/2239/3244/files/34296889098.pdf
    • https://cdn.shopify.com/s/files/1/0429/6785/9359/files/livre_apprendre_espagnol.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zavoriduxosijalas.pdf
    • https://cdn.shopify.com/s/files/1/0430/8716/7645/files/forces_unit_2_worksheet_2.pdf
    • https://cdn.shopify.com/s/files/1/0434/7042/2180/files/vocal_training_app_android_free.pdf
    • https://cdn.shopify.com/s/files/1/0429/5730/8063/files/xazomofadeterujilijute.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_off00004821.bin
ac445664152b531e185d8ea04718a7f0865969eed139be55cee1f090c1402f0b
pdf-font-stream PDF embedded font (sfnt) at offset 0x4821 5064 bytes
font_01_sfnt_off0000594f.bin
4e162be2b8a1e4c5052b2d5ef0feefbdd0fe3fe6eeabd77bbdac1ca06249e5d7
pdf-font-stream PDF embedded font (sfnt) at offset 0x594F 10108 bytes