Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa0c0f1b7060481c…

MALICIOUS

PDF

38.1 KB Created: 2020-09-13 01:22:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f39a4c0956cdc7f1db93c0c32c456229 SHA-1: 0736ae03b3f3945c21305987ebb60e42bbee4ff0 SHA-256: fa0c0f1b7060481ca26e7953d1c145a665c468521903d43339b3c6fe6fc3fbad
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, a common tactic for SEO poisoning and redirecting users to malicious sites. One critical heuristic identified a link to known malicious redirector infrastructure, specifically 'https://ttraff.link/wix?keyword=lg+inverter+direct+drive+washer+manual+top+loader'. The document body, though heavily obfuscated, contains text related to an LG washing machine manual, likely serving as a lure. The ML classifier strongly indicated maliciousness, supporting the assessment of 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.link/wix?keyword=lg+inverter+direct+drive+washer+manual+top+loader
    • http://files.thuruthoorsinaimount.com/uploads/1/3/1/8/131856415/woxoxab_dumevenu_kakitaxusotases.pdf
    • http://sagotas.montejournal.com/uploads/1/3/1/8/131856907/b006dd40081.pdf
    • http://zunuwovup.ventisim.com/uploads/1/3/2/7/132712376/mirig.pdf
    • http://libesigud.myuntoldpleasures.com/uploads/1/3/2/6/132683071/8534005.pdf
    • http://tadimofin.barbaraschupack.com/uploads/1/3/1/6/131606346/9148163.pdf
    • https://static.usrfiles.com/ugd/4cf28d_695b13836df545ef8693d7afcddbcc29.pdf
    • https://static.usrfiles.com/ugd/b8c837_48dfbe299e9a4f2b8cf9536bfa38540c.pdf
    • https://static.usrfiles.com/ugd/3ed902_2e536dd7eba947fc930961906333fa1c.pdf
    • https://static.usrfiles.com/ugd/87fdc7_b061e3d28a1e4ac9b3974ab0c40706e3.pdf
    • https://cdn.shopify.com/s/files/1/0457/3734/5180/files/71951789469.pdf
    • https://cdn.shopify.com/s/files/1/0482/0284/2264/files/bikujaviluvurimisategog.pdf
    • https://cdn.shopify.com/s/files/1/0431/7567/4024/files/dilevisakigurubu.pdf
    • https://cdn.shopify.com/s/files/1/0461/8256/3993/files/50718460830.pdf
    • https://cdn.shopify.com/s/files/1/0431/7547/7405/files/rilivibebos.pdf
    • https://cdn.shopify.com/s/files/1/0428/3806/5319/files/wedizulunolixaviteb.pdf
    • https://cdn.shopify.com/s/files/1/0461/4992/7075/files/suwera.pdf
    • https://cdn.shopify.com/s/files/1/0431/3756/4838/files/18065654613.pdf
    • https://cdn.shopify.com/s/files/1/0439/1672/2344/files/58502867073.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_off000053cc.bin
3cd8e10df5907596ba0d59e56ae2b41410270f92927e660e9076097939c8fd52		 pdf-font-stream PDF embedded font (sfnt) at offset 0x53CC 5580 bytes
font_01_sfnt_off000066b8.bin
fe38290b2dcdd2e99bbaa422fb4ead4b6ee7b8a5dd78a7597649e2e3d0472ede		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66B8 10644 bytes

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