Malicious PDF — malware analysis report

Static analysis result for SHA-256 2800d975dc3a95e8…

MALICIOUS

PDF

44.5 KB Created: 2020-08-24 20:33:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 13fe4bc85f786b214da12a490a003971 SHA-1: e9e0ae8b4a93dac0f17a3e893c6a36d4edd3499b SHA-256: 2800d975dc3a95e85f4a0387af7a9a27d5bbfaee2e54fe7bcd369e4b57bed968
152 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to PDF files hosted on Shopify. One of these links, https://ttraff.cc/pify?keyword=c%252F+o+form+ak+korea, is identified as a malicious redirector. This suggests the document is part of a link farm or SEO poisoning campaign designed to lure users to malicious sites. No scripts were extracted, limiting the analysis of direct payload delivery.

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/pify?keyword=c%252F+o+form+ak+korea
    • http://nebixut.2whatknots.com/uploads/1/3/1/4/131454215/9882858.pdf
    • https://cdn.shopify.com/s/files/1/0433/4996/6998/files/unturned_econ_ticket_failed_verification.pdf
    • https://cdn.shopify.com/s/files/1/0434/4256/9383/files/bohemian._rhapsody_piano.pdf
    • https://cdn.shopify.com/s/files/1/0440/2606/9157/files/el_imperialismo_formal_significado.pdf
    • https://cdn.shopify.com/s/files/1/0428/8764/3303/files/15_minute_countdown.pdf
    • https://cdn.shopify.com/s/files/1/0434/4823/8236/files/word_label_template_16_per_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0432/8036/7780/files/97679535394.pdf
    • https://cdn.shopify.com/s/files/1/0428/2253/3276/files/34010885442.pdf
    • https://cdn.shopify.com/s/files/1/0431/2462/1473/files/magokebazipuxikoxal.pdf
    • https://cdn.shopify.com/s/files/1/0427/4746/1788/files/loxisutixutezugimopamibu.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_off0000733c.bin
d91f98116819c9aca51db3c5c4f8e27a73c66f55af878483158ed17ec87f7389		 pdf-font-stream PDF embedded font (sfnt) at offset 0x733C 4708 bytes
font_01_sfnt_off0000832e.bin
7263ef6bbe415be84a4339ffae615e7ea0a3b7151a7f087cf9471d8faaa94edc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x832E 10132 bytes

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