Malicious PDF — malware analysis report

Static analysis result for SHA-256 32b7ce0ae026f121…

MALICIOUS

PDF

46.8 KB Created: 2020-08-21 13:27:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: da65250fc47438a21dd232f3d7489023 SHA-1: afe6b1de338bad54e7ac92a4c90c02e247664b57 SHA-256: 32b7ce0ae026f1219a919b83105dbcf6f175346f9c9f142c7d03193e781bb004
152 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body text, though partially corrupted, includes a URL that appears to be a lure for a sports match report. This URL, 'https://ttraff.com/pify?keyword=bournemouth+vs+man+utd+match+report', is the primary indicator of the attack pattern. The ML classifier also strongly flagged this PDF as malicious.

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.com/pify?keyword=bournemouth+vs+man+utd+match+report
    • http://files.jbeardmanagementinc.com/uploads/1/3/1/1/131164117/866e8e.pdf
    • http://jesopero.nikkiarnell.net/uploads/1/3/1/3/131379808/pivokuw.pdf
    • http://files.providencebaptistchurch.org.uk/uploads/1/3/1/0/131070331/xuruparufiw.pdf
    • https://cdn.shopify.com/s/files/1/0433/6310/6968/files/64629651394.pdf
    • https://cdn.shopify.com/s/files/1/0431/7465/8216/files/jifowuxaga.pdf
    • https://cdn.shopify.com/s/files/1/0437/9217/1165/files/meridian_energy_pen.pdf
    • https://cdn.shopify.com/s/files/1/0433/7877/0076/files/fujobisizijusikibeve.pdf
    • https://cdn.shopify.com/s/files/1/0432/7132/3808/files/easy_fun_piano_songs.pdf
    • https://cdn.shopify.com/s/files/1/0427/4978/8327/files/6487075575.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/redukenedobitaguwowok.pdf
    • https://cdn.shopify.com/s/files/1/0439/7580/3038/files/14266069660.pdf
    • https://cdn.shopify.com/s/files/1/0437/5596/2522/files/bmth_sempiternal_full_album.pdf
    • https://cdn.shopify.com/s/files/1/0437/7542/6721/files/69996839158.pdf
    • https://cdn.shopify.com/s/files/1/0432/0113/4747/files/sebesupututogetalisifon.pdf
    • https://cdn.shopify.com/s/files/1/0428/4504/4892/files/desuwabikoxumoneloruguz.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_off00007833.bin
90ef866829c47c084206e0d6e8a56b213fdac5f93cc8ea06fab82e947563fd58
pdf-font-stream PDF embedded font (sfnt) at offset 0x7833 5388 bytes
font_01_sfnt_off00008a5a.bin
d2e54d5e01cad2a265b8bf7083a19a242a34d0f4af62d61d90f6db3b162fcc3f
pdf-font-stream PDF embedded font (sfnt) at offset 0x8A5A 10396 bytes