Malicious PDF — malware analysis report

Static analysis result for SHA-256 a32d0c0d4f18bd5c…

MALICIOUS

PDF

41.8 KB Created: 2020-11-05 15:55:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cfcaf2ecfee1aef2d6495dad4e7c3677 SHA-1: 1f3759318bd57012fefe8dc28abdb369a3300c53 SHA-256: a32d0c0d4f18bd5cdd707412f3413ddd4ba65ab2a06f6aa456afb69f9b2f48c4
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains numerous embedded links, many pointing to link farms and a known malicious redirector. The document body, though partially corrupted, includes text suggesting it is a user manual, likely a lure to trick users into visiting malicious sites. The ML classifier strongly indicated maliciousness, and the presence of a malicious redirector URL confirms the intent to lead users to harmful content.

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://cctraff.ru/aws?keyword=olympus+vin-541pc+user+manual
    • https://topemarepebide.weebly.com/uploads/1/3/4/3/134316461/kekatufasikujugu.pdf
    • https://fodezamu.weebly.com/uploads/1/3/1/4/131407453/7517590.pdf
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/tunitulo.pdf
    • https://gafalevomunu.weebly.com/uploads/1/3/4/2/134235362/dodunil.pdf
    • https://joxenawofin.weebly.com/uploads/1/3/4/3/134342561/kivojidupiz_papetelilotoxer.pdf
    • https://pusojavinobaz.weebly.com/uploads/1/3/4/3/134353251/0ff639342e407ca.pdf
    • https://fijojonibiw.weebly.com/uploads/1/3/2/6/132681787/a8401ec7a9859.pdf
    • https://xibopenevitamog.weebly.com/uploads/1/3/4/4/134488628/1934496.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/saziwijaxodav/tasujilarifibiteg.pdf
    • https://s3.amazonaws.com/bubeto/59415857822.pdf
    • https://s3.amazonaws.com/zupenafud/free_retail_business_plan_sample.pdf
    • https://uploads.strikinglycdn.com/files/ab6f0560-1534-42c4-8df5-3c733c0ab4c7/61462819703.pdf
    • https://s3.amazonaws.com/jifesu/biparental_inheritance_of_mitochondrial_dna_in_humans.pdf
    • https://uploads.strikinglycdn.com/files/1d6044df-24a8-4563-b621-1bb65c1a3463/xinefozuzejijaxudetulel.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006462.bin
e90226dbb1f496cbb5d20f35982c5689037da8eb8fabaeb6b657d385af37b1d2
pdf-font-stream PDF embedded font (sfnt) at offset 0x6462 5564 bytes
font_01_sfnt_off0000775e.bin
be49f1a31ac7f897a8859392ea712fc732db049b00ebdd0e521e2707e9bae2b0
pdf-font-stream PDF embedded font (sfnt) at offset 0x775E 10356 bytes