Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a7f4632d59ddd28…

MALICIOUS

PDF

46.5 KB Created: 2020-08-25 09:03:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: eb96fde7ecb6393b0f5e9301575628e7 SHA-1: e002cff4d46267a9abea118985d70e924832f563 SHA-256: 4a7f4632d59ddd28a4904d93745f48dbaa5df8ac46dbe80dcdc2c5aacb690269
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF document contains a lure related to a "Bikini body guide" review, which is a common theme for phishing and scam content. It embeds numerous links, with a critical heuristic identifying a link to a known malicious redirector at `https://ttraff.cc/pify?keyword=bikini+body+guide+1.+0+review`. This redirector likely leads to a malicious payload or phishing page. The ML classifier strongly supports the malicious nature of this PDF.

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=bikini+body+guide+1.+0+review
    • http://files.surrenderedtochrist.org/uploads/1/3/2/6/132681836/94dabc0920d5.pdf
    • http://sebunivek.smokymtnquilters.com/uploads/1/3/1/3/131398455/ff5433d2656.pdf
    • https://cdn.shopify.com/s/files/1/0428/2250/0518/files/83209524029.pdf
    • https://cdn.shopify.com/s/files/1/0430/6989/8903/files/63168912431.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/meragavafeduxilaxopuxaw.pdf
    • https://cdn.shopify.com/s/files/1/0435/8589/6609/files/predicate_adjective_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0433/9741/5077/files/dutuduxoruziga.pdf
    • https://cdn.shopify.com/s/files/1/0437/5291/5098/files/36762466051.pdf
    • https://cdn.shopify.com/s/files/1/0432/4474/8950/files/velomotikotizi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9455/7347/files/west_africa_map.pdf
    • https://cdn.shopify.com/s/files/1/0428/7443/7791/files/pulodadeg.pdf
    • https://cdn.shopify.com/s/files/1/0430/6986/6141/files/lagijulopexisosenamagubu.pdf
    • https://cdn.shopify.com/s/files/1/0448/2046/3778/files/simbiosis_biologia.pdf
    • https://cdn.shopify.com/s/files/1/0435/6158/2755/files/55249214198.pdf
    • https://cdn.shopify.com/s/files/1/0433/3728/5797/files/32159272770.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_off000075f5.bin
391633209894ca75f45af9312ef66e2fce2f432b20d5f080893b5a21368eb49f
pdf-font-stream PDF embedded font (sfnt) at offset 0x75F5 5304 bytes
font_01_sfnt_off0000883b.bin
90716292e2c9ea6776b2a076e4098923054b1238ebe7a01042a63f1cef1123f3
pdf-font-stream PDF embedded font (sfnt) at offset 0x883B 10868 bytes