Malicious PDF — malware analysis report

Static analysis result for SHA-256 46faf85766f8a396…

MALICIOUS

PDF

45.3 KB Created: 2020-08-21 19:20:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: da8d8c5c27589eae6f2bf4af6ad7f65c SHA-1: fa4ffa2f48d30c204be7690dbbf2595b0720ed9c SHA-256: 46faf85766f8a3962c601f71c3280ca951ec407afe2ff9d10313d6d07b84b076
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one critical heuristic identifying a link to a known malicious redirector infrastructure at 'https://ttraff.cc/pify?keyword=best+stock+android+tablet+2019'. Another heuristic indicates a PDF link farm, suggesting a tactic to distribute malicious content or SEO spam. The ML classifier strongly flagged this PDF as malicious. No scripts were extracted from this sample.

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=best+stock+android+tablet+2019
    • http://files.piecefuldesignsmosaics.com/uploads/1/3/1/1/131163914/a4134c53.pdf
    • http://files.bornadventuregear.com/uploads/1/3/0/7/130776408/3845349.pdf
    • http://files.ottawarotarycalendar.com/uploads/1/3/0/8/130873903/5009673.pdf
    • http://jejiw.skinwiserx.com/uploads/1/3/1/6/131606457/6959760.pdf
    • http://wukopiko.spiritual-research-network.com/uploads/1/3/0/8/130874488/nudekefenosumegaponu.pdf
    • https://cdn.shopify.com/s/files/1/0437/4809/8209/files/tokafowojosekolupubukade.pdf
    • https://cdn.shopify.com/s/files/1/0433/2394/9224/files/ielts_essay_samples_band_9_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/8049/8852/files/kunibom.pdf
    • https://cdn.shopify.com/s/files/1/0431/5915/8946/files/26230793052.pdf
    • https://cdn.shopify.com/s/files/1/0439/2324/3176/files/rekumisivokubuzulun.pdf
    • https://cdn.shopify.com/s/files/1/0438/6720/9893/files/laxituw.pdf
    • https://cdn.shopify.com/s/files/1/0436/0372/2398/files/baaghi_movie_song_video.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rirolor.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000645b.bin
b86593cc16fee51dbe41a9ea471a1ea63eb1b2fff7dfb3a960d53f30c20c1dbf
pdf-font-stream PDF embedded font (sfnt) at offset 0x645B 5456 bytes
font_01_sfnt_off000076eb.bin
d3f6fcadb99a6aaf63acdb0d1e8477cff8965b029b330c1a844e7b9d6f65823f
pdf-font-stream PDF embedded font (sfnt) at offset 0x76EB 10364 bytes
font_02_sfnt_off00009a67.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c
pdf-font-stream PDF embedded font (sfnt) at offset 0x9A67 4324 bytes