Malicious PDF — malware analysis report

Static analysis result for SHA-256 bdc6ac4f5181fd83…

MALICIOUS

PDF

64.7 KB Created: 2020-08-09 17:00:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 10c7c79510bc45c645fb4a5e99560bb5 SHA-1: 8045bb890d0b62978d979d1b69e858cf05ec52a1 SHA-256: bdc6ac4f5181fd83861764dc2a9de131c6d8019b3b95cb140e98f00cc01df3b5
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic identifying a malicious redirector. The primary malicious URL is https://ttraff.ru/pify?keyword=alice+in+wonderland+disney+story+pdf, which is likely used to redirect users to a malicious site. The document body, though heavily obfuscated, contains references to the malicious URL and other Shopify-hosted PDFs, suggesting a link farm or SEO poisoning tactic to distribute malware. The ML classifier strongly indicates 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.ru/pify?keyword=alice+in+wonderland+disney+story+pdf
    • http://kaduka.globalcompassionday.com/uploads/1/3/0/8/130813612/e02a6d8cd305468.pdf
    • http://files.flyhiluv.com/uploads/1/3/0/8/130814245/19d777068248e.pdf
    • http://files.mmprofilingandsharpening.com/uploads/1/3/1/8/131872055/saxutobatasop_sosefideg_lipetup.pdf
    • http://kemifew.crowleyroofers.com/uploads/1/3/1/4/131483337/taxov-zisanebatika-xilumusefudi.pdf
    • https://cdn.shopify.com/s/files/1/0432/5307/2022/files/jirijerukanaxo.pdf
    • https://cdn.shopify.com/s/files/1/0431/0866/3456/files/kaxizixuzarotatezodu.pdf
    • https://cdn.shopify.com/s/files/1/0428/5346/6271/files/sukerosazibajebav.pdf
    • https://cdn.shopify.com/s/files/1/0433/9816/8727/files/xuzapugagadunituxul.pdf
    • https://cdn.shopify.com/s/files/1/0435/7731/1391/files/cognition_and_emotion_from_order_to_disorder.pdf
    • https://cdn.shopify.com/s/files/1/0430/9801/3863/files/megulofuwogete.pdf
    • https://cdn.shopify.com/s/files/1/0434/1969/7308/files/concept_of_human_development_index.pdf
    • https://cdn.shopify.com/s/files/1/0433/9607/1589/files/a_quiver_full_of_arrows_jeffrey_archer.pdf
    • https://cdn.shopify.com/s/files/1/0432/3121/5780/files/inkscape_to_dxf.pdf
    • https://cdn.shopify.com/s/files/1/0434/2461/2508/files/figifi.pdf
    • https://cdn.shopify.com/s/files/1/0432/9183/6566/files/accounting_101_terms.pdf
    • https://cdn.shopify.com/s/files/1/0435/5319/4133/files/cerfa_vente_vhicule_occasion.pdf
    • http://traffic.libsyn.com/dlrage/DSO-Ep7a-Alice-in-Wonderland-Part1.mp3Podcast
    • 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_off0000bec9.bin
f5485f113a9b7b8887aecb2f442e4454fbdc415d2e06ceea7862bec650f48804		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBEC9 5332 bytes
font_01_sfnt_off0000d114.bin
df004578b623bdc9dc6811a131c5b1f2ac1bb19aa70d965fcb18b0a67d5f1d79		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD114 10816 bytes

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