Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0e347bbee294f87…

MALICIOUS

PDF

46.8 KB Created: 2020-09-01 01:21:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cc64e74dcb43a89fc22e0285d92825ce SHA-1: edbab9e19c8caf1b1b51d8b8233c28199ef7d7cc SHA-256: a0e347bbee294f8769ba3a4e93a55cfb9c5b8daf60822547f340bc935f7a69dd
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing indicating it's a malicious redirector link farm. The primary malicious URL identified is 'https://ttraff.cc/wix?keyword=bhojpuri+video+gana+song', which is likely used to redirect users to malicious content. The document body, though heavily obfuscated, contains keywords related to the embedded links, suggesting a lure to entice clicks.

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/wix?keyword=bhojpuri+video+gana+song
    • https://static.usrfiles.com/ugd/b8c837_89d332af4a29486188fe47c5a757534d.pdf
    • https://static.usrfiles.com/ugd/3615fb_272019b769e24a8fb53320743a7a85de.pdf
    • https://static.usrfiles.com/ugd/f0f215_23827a43b5b145238449f3a83e4948f4.pdf
    • https://static.usrfiles.com/ugd/b8c837_b89d1339c7be4540bef989657ddeba12.pdf
    • https://cdn.shopify.com/s/files/1/0431/8570/1025/files/pawaxivepomawipo.pdf
    • https://static.usrfiles.com/ugd/912de2_7f8d0801ea3b429f92445d486778a169.pdf
    • https://static.usrfiles.com/ugd/e2f7e1_020afa58803e45cd9cb8709e284c6a3c.pdf
    • https://static.usrfiles.com/ugd/defcb2_369c11c3c00244d19b49133a8b5adcef.pdf
    • https://static.usrfiles.com/ugd/b8c837_4e61b36b44b9497eb033aba670c7ed9b.pdf
    • https://cdn.shopify.com/s/files/1/0444/7302/4679/files/80805876704.pdf
    • https://cdn.shopify.com/s/files/1/0428/9875/1641/files/98273087962.pdf
    • https://cdn.shopify.com/s/files/1/0432/0270/7616/files/costco_carport_instructions.pdf
    • https://cdn.shopify.com/s/files/1/0438/0822/7490/files/zosekemowa.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000053ce.bin
bb1fb6ac9068645c256d33cb38616d5a976740d23c70f8b51884662e1310bead
pdf-font-stream PDF embedded font (sfnt) at offset 0x53CE 5372 bytes
font_01_sfnt_off00006622.bin
4b2349b10b5064a1d7097884b6243a5f6e2d5341c42e040f08a6dbf71946ce5b
pdf-font-stream PDF embedded font (sfnt) at offset 0x6622 14780 bytes
font_02_sfnt_off0000943e.bin
971eff87f2051b75c833c6e78f6768bf6df5d518312a506457705563f80e415c
pdf-font-stream PDF embedded font (sfnt) at offset 0x943E 7960 bytes