Malicious PDF — malware analysis report

Static analysis result for SHA-256 5fe04c1fd0f96780…

MALICIOUS

PDF

53.3 KB Created: 2020-09-12 00:59:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2399056f1faedd9fe4e18df8553e85e9 SHA-1: bbf96caf67ee00c3a44575b9c6e36bc1eb81a5bd SHA-256: 5fe04c1fd0f96780e9a41b80b288a8b722e7e80e268d79827213fd90f01f040a
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains numerous links, many of which point to external PDF files, suggesting a link farm or SEO manipulation tactic. One critical heuristic identified a link to known malicious redirector infrastructure at 'https://ttraff.club/wix?keyword=analytic+function+definition+pdf'. The document body itself is heavily obfuscated but contains this URL, indicating the primary intent is to redirect the user to malicious content. 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.club/wix?keyword=analytic+function+definition+pdf
    • http://files.truthlifevictorychurch.org/uploads/1/3/1/3/131383821/zowefode.pdf
    • http://damov.tilleyrent.com/uploads/1/3/0/7/130738850/9547366.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0438/6488/3355/files/android_phone_contacts_backup_to_pc.pdf
    • https://cdn.shopify.com/s/files/1/0460/3723/7924/files/adverbs_worksheets_grade_3.pdf
    • https://cdn.shopify.com/s/files/1/0465/0241/2440/files/73753766525.pdf
    • https://cdn.shopify.com/s/files/1/0433/7932/7141/files/cadillac_owners_manual.pdf
    • https://static.usrfiles.com/ugd/70094d_c8b13c97ae554befbc38eb1a885eb777.pdf
    • https://static.usrfiles.com/ugd/fac845_1d448d914fe24004bdaf4ad4632d2b3a.pdf
    • https://static.usrfiles.com/ugd/f08e01_9818d4a23bf64a5caa88ed1e48cd600c.pdf
    • https://static.usrfiles.com/ugd/de60da_bfbaf5f00f2f42f5a18b008161169696.pdf
    • https://static.usrfiles.com/ugd/12daa7_983764cd89b74bb99a10b8282a781955.pdf
    • https://static.usrfiles.com/ugd/b8c837_1ce5197c9e444e41af22a31f73cc618d.pdf
    • https://static.usrfiles.com/ugd/b8c837_663a55f8981a44bc82b73d35778bb442.pdf
    • https://static.usrfiles.com/ugd/ca32a8_4f7b12b83d1941f08183fa1b77b7483e.pdf
    • https://static.usrfiles.com/ugd/384ea4_f9ff72fb7b2b411cb08bc6fd47a7498f.pdf
    • https://static.usrfiles.com/ugd/843280_5340dc87c5c1494ba644493c0cd5ca9d.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/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007677.bin
60a16c2615d2518c9d9dfa7590602270a6e4265626c282d02d2fbdcd6b2ef446		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7677 4964 bytes
font_01_sfnt_off00008786.bin
a0b7ba2b3ec25fb679c641cdca60dce735ab2bfcca42f2300c166a5d6ea24192		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8786 13072 bytes
font_02_sfnt_off0000b240.bin
c1e2b2aa02336a0cd69dea6cce97d0251a203158c86018371d38022993ea1cde		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB240 16372 bytes

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