Malicious PDF — malware analysis report

Static analysis result for SHA-256 7effd32a54d98d27…

MALICIOUS

PDF

49.5 KB Created: 2020-09-10 13:13:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0c61c8b1c55a94c3fcef7892cf9ea8b2 SHA-1: 4d34c8222984207c030981d44cf89e1a6b520e45 SHA-256: 7effd32a54d98d27a6906b3426add78075d96c3e59e17f5d013c51073dcb4d9c
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 of which point to a redirector service. The document body text, though heavily obfuscated, contains a URL that appears to be a lure for popular media content, suggesting a social engineering tactic. The primary malicious URL identified is ttraff.me, which is flagged as a malicious redirector.

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.me/wix?keyword=baahubali+2+songs+in+tamil++starmusiq
    • https://static.usrfiles.com/ugd/762c1a_7429ee09c29745ea83ca61cfc6daddcc.pdf
    • https://static.usrfiles.com/ugd/cac9e4_932f1a2207df467393aca35e7fbb72cc.pdf
    • https://static.usrfiles.com/ugd/0b46e6_65834d8c83924089977f1f568520f54f.pdf
    • https://static.usrfiles.com/ugd/60e703_709edfdc550044d6a3942ce57c6b35dc.pdf
    • https://static.usrfiles.com/ugd/05e3ad_a61cce1ad84e4c1b8ee3c983707d74c6.pdf
    • https://static.usrfiles.com/ugd/f67134_08c724dfb6d24f4ba90ce22decbef304.pdf
    • https://static.usrfiles.com/ugd/ff3115_ac9ae586cd8f466cb25dad4da75fe52d.pdf
    • https://static.usrfiles.com/ugd/136d3d_8e5cd2d729024744a9228940eacb0372.pdf
    • https://static.usrfiles.com/ugd/64d889_ddc9c8e6017a48f289dfbfc12f526f47.pdf
    • https://static.usrfiles.com/ugd/ee4d88_cea795b92f0e401eb252dfda27cce731.pdf
    • https://static.usrfiles.com/ugd/d43733_cc3e5ea320484fd793dec138323132dc.pdf
    • https://static.usrfiles.com/ugd/c81504_b8afd583498a47108f0cca511a09c31d.pdf
    • https://static.usrfiles.com/ugd/68ec51_4c90ca3660114efbb5a6995525454296.pdf
    • https://static.usrfiles.com/ugd/d8e941_d13bf4f592d9407e85340f5a170bc79a.pdf
    • https://static.usrfiles.com/ugd/98857b_64b57775918b4dde869462fe04d3727e.pdf
    • https://cdn.shopify.com/s/files/1/0434/7055/3250/files/simanovuvabuxarilez.pdf
    • https://cdn.shopify.com/s/files/1/0428/8184/3353/files/burajej.pdf
    • https://cdn.shopify.com/s/files/1/0440/4019/2150/files/giggly_guide_to_grammar_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0430/0659/1127/files/64189662247.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_off00007291.bin
8a852093afcb038c8151a13e1c615b265c35de4c73648653949cf3bc43872d3d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7291 5312 bytes
font_01_sfnt_off0000845c.bin
1146781864126c76079bbc8c506ca5b836257aa4ead1d5c803f2e416104e35a2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x845C 11728 bytes
font_02_sfnt_off0000aaa1.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAAA1 4324 bytes

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