Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac2aa8701264643f…

MALICIOUS

PDF

34.9 KB Created: 2020-08-25 11:58:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3978b8d13933a189123010c2e1148f1f SHA-1: babc5d4d1f3fa8c46d2cbd10182b53025889e227 SHA-256: ac2aa8701264643fe9cb77c2c0f723546b33e516e59ec0f3e021a9503c5cd489
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with a critical heuristic firing for a malicious redirector. The primary malicious URL identified is https://ttraff.cc/pify?keyword=anari+movie+songs+mp4+free. The document body appears to be corrupted or heavily obfuscated, but the presence of numerous links, including to a redirector, strongly suggests a phishing or content-luring campaign. The ML classifier also flagged this PDF with high confidence.

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=anari+movie+songs+mp4+free
    • http://files.pureemotionphotography.com/uploads/1/3/2/3/132302824/dfb5692.pdf
    • http://files.sjuartdesign.com/uploads/1/3/1/6/131606087/wulixakitanajukaf.pdf
    • http://veretuw.trinityriverridingclub.org/uploads/1/3/0/9/130969465/kuselabudopilirilito.pdf
    • http://kanip.rasacacorporation.com/uploads/1/3/0/7/130776321/penejudoxu_puwukexe_mitewim.pdf
    • http://sogid.ndsportschannel.com/uploads/1/3/1/4/131437657/932a203193d.pdf
    • https://cdn.shopify.com/s/files/1/0433/3341/9160/files/watch_sankat_mochan_mahabali_hanumaan.pdf
    • https://cdn.shopify.com/s/files/1/0435/1302/0570/files/autoestima_en_adolescentes.pdf
    • https://cdn.shopify.com/s/files/1/0433/0101/1614/files/28419144959.pdf
    • https://cdn.shopify.com/s/files/1/0435/2743/8488/files/xivukofemezifasanu.pdf
    • https://cdn.shopify.com/s/files/1/0435/3903/8360/files/atlas_copco_service_manual.pdf
    • https://cdn.shopify.com/s/files/1/0429/8460/3801/files/nugovevobanorubikumito.pdf
    • https://cdn.shopify.com/s/files/1/0438/8909/8907/files/cartesian_plane_printable.pdf
    • https://cdn.shopify.com/s/files/1/0447/1390/2234/files/biometric_attendance_form.pdf
    • https://cdn.shopify.com/s/files/1/0431/0358/4409/files/80094122950.pdf
    • https://cdn.shopify.com/s/files/1/0431/7511/6964/files/10116932358.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_off00004b59.bin
d47b3a99d833341945588d640b37fc61b09b1917d7942877c022a681a8b80630
pdf-font-stream PDF embedded font (sfnt) at offset 0x4B59 5324 bytes
font_01_sfnt_off00005d6e.bin
d7b57f8cdf34e80f3eac9d854b28a873061ef23d19fedc19b7e599a38816121b
pdf-font-stream PDF embedded font (sfnt) at offset 0x5D6E 9848 bytes