Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b6cc7fd3b9d45b7…

MALICIOUS

PDF

42.5 KB Created: 2020-08-01 19:23:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 30d48b3340efb9b684feaab40166114e SHA-1: 2e6053e1bdd93ad832a1bd808677e21015d1e9f4 SHA-256: 1b6cc7fd3b9d45b72f9c17282f4ee6d1f3301b0e4e0ebfe64b600e4636d7f7cb
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a lure related to 'Minecraft mods download xbox 360' and includes a large number of embedded links, many of which point to a link farm infrastructure. The primary malicious URL identified is https://ttraff.ru/pify?keyword=minecraft+mods+download+xbox+360, which appears to be a redirector. The ML classifier strongly indicated maliciousness, and the PDF structure itself suggests a link farm for SEO manipulation or malicious redirection.

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.ru/pify?keyword=minecraft+mods+download+xbox+360
    • http://files.kkerner.com/uploads/1/3/0/8/130874683/3986062.pdf
    • http://files.iamishmael.com/uploads/1/3/0/8/130813859/veputejivuki-wajujujifi-fenumubekepab-sabojoz.pdf
    • http://files.rawseries.org/uploads/1/3/1/3/131384401/nurukudezeseg.pdf
    • http://files.customerfocusedlearning.com/uploads/1/3/1/3/131381422/3911861.pdf
    • https://cdn.shopify.com/s/files/1/0435/0862/9663/files/crouton_chromebook_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/4085/7494/files/xenesijoxetojesemalofuwok.pdf
    • https://cdn.shopify.com/s/files/1/0435/5486/5320/files/38695067688.pdf
    • https://cdn.shopify.com/s/files/1/0429/7415/0809/files/vagimesi.pdf
    • https://cdn.shopify.com/s/files/1/0433/8316/0995/files/rinilivodazetuxufategaji.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/befuxaj.pdf
    • https://cdn.shopify.com/s/files/1/0440/9350/5688/files/91385692403.pdf
    • https://cdn.shopify.com/s/files/1/0429/7529/7689/files/meroritirefojuzorolu.pdf
    • https://cdn.shopify.com/s/files/1/0430/6118/2617/files/97497280624.pdf
    • https://cdn.shopify.com/s/files/1/0433/4573/9941/files/marafozojezaxupepijozema.pdf
    • https://cdn.shopify.com/s/files/1/0432/8561/0654/files/57218114003.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_off00006520.bin
a7695cc9f13ab639ba743547f3b1087ebd64f1f05dbe9b962925ba03407f1688
pdf-font-stream PDF embedded font (sfnt) at offset 0x6520 5932 bytes
font_01_sfnt_off00007956.bin
75a7dceba5e855c122accd5549b3053442d6132df2f792e56800265ff37c570d
pdf-font-stream PDF embedded font (sfnt) at offset 0x7956 10492 bytes