Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c48afd9204746f9…

MALICIOUS

PDF

45.6 KB Created: 2020-08-01 15:42:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c7f34e0ea9fa16fed6e47cbed693384e SHA-1: 28d2672a064ef4f78a3f04e3642026049e0e2cae SHA-256: 9c48afd9204746f9868ea1ec63be85f594818462043619a930dedc43946bb91c
152 Risk Score

Malware Insights

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

The PDF contains a link to a redirector URL (https://ttraff.cc/pify?keyword=besm+3rd+edition+pdf+download) which is flagged as malicious. It also hosts a large number of external PDF links, many pointing to Shopify domains, suggesting a link farm for SEO manipulation or distributing malicious content. The ML classifier strongly indicated maliciousness.

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=besm+3rd+edition+pdf+download
    • http://files.rbvonline.com/uploads/1/3/0/8/130873738/levarok-fezalepaka-zipoluzuririred-wabib.pdf
    • http://files.thesandyhookkidscenter.com/uploads/1/3/0/8/130814055/mudagexuxomukuzena.pdf
    • http://files.middlesexmotorcycle.com/uploads/1/3/1/8/131871762/1406230.pdf
    • http://files.adrenalinedanceamplified.com/uploads/1/3/0/8/130814529/zupoxabu-doworanexojesi-famenil.pdf
    • http://files.triclubechelon.com/uploads/1/3/1/8/131871633/gegodajina.pdf
    • https://cdn.shopify.com/s/files/1/0431/7511/6960/files/fuxujujekutorobegesir.pdf
    • https://cdn.shopify.com/s/files/1/0439/0676/0856/files/giwobigosimubamijotu.pdf
    • https://cdn.shopify.com/s/files/1/0430/6993/1671/files/70081472555.pdf
    • https://cdn.shopify.com/s/files/1/0433/6097/7048/files/94332714033.pdf
    • https://cdn.shopify.com/s/files/1/0429/9702/2871/files/fapajarot.pdf
    • https://cdn.shopify.com/s/files/1/0434/2172/8930/files/burawesotit.pdf
    • https://cdn.shopify.com/s/files/1/0434/5203/9328/files/11826586465.pdf
    • https://cdn.shopify.com/s/files/1/0430/6688/4250/files/29804401413.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/40035930655.pdf
    • https://cdn.shopify.com/s/files/1/0433/1126/7990/files/pevugufox.pdf
    • https://cdn.shopify.com/s/files/1/0437/6333/5326/files/27706974896.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_off0000738e.bin
ab10646cddf2a812cc08c23ec89c4f7705c4af4c47b13a20ddd718f02cb8ea3f
pdf-font-stream PDF embedded font (sfnt) at offset 0x738E 5492 bytes
font_01_sfnt_off00008636.bin
5e6b77836b0086b07c4c1e135777f92012982b46a450e90958bd91da20a68988
pdf-font-stream PDF embedded font (sfnt) at offset 0x8636 10452 bytes