Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc886b8bf08e6ca5…

MALICIOUS

PDF

38.8 KB Created: 2020-08-09 02:18:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 19def6621e0bd85639d1468145106016 SHA-1: 50ec22cb81ef9fc800ee8a2b83f7785486fefba6 SHA-256: dc886b8bf08e6ca51bd12fcfad03d29e5f507ba01f1fdd705986194727aac977
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains hosting other PDFs, and one critical link to a known malicious redirector at `https://ttraff.ru/pify?keyword=ine+ccie+sp+v4+workbook+pdf`. This suggests a link farm or SEO poisoning attack designed to redirect users to malicious content. The ML classifier strongly supports the malicious verdict.

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=ine+ccie+sp+v4+workbook+pdf
    • http://files.conditionsforlearning.com/uploads/1/3/0/9/130969430/7320064.pdf
    • http://files.barefootcustomknives.com/uploads/1/3/2/8/132814624/bixajolafo.pdf
    • http://files.anitagoodidea.com/uploads/1/3/0/9/130969481/6224011.pdf
    • http://files.nphsjrwolfpack.com/uploads/1/3/1/4/131483253/pageponiputi_gosalobire_vopepas_fatibo.pdf
    • http://gejurasux.farmworkerministry.org/uploads/1/3/1/3/131379578/godipibaxazura.pdf
    • https://cdn.shopify.com/s/files/1/0428/3714/7811/files/safalilejuvusedobema.pdf
    • https://cdn.shopify.com/s/files/1/0431/6885/8280/files/volazewadijuvogejin.pdf
    • https://cdn.shopify.com/s/files/1/0436/4143/8366/files/99054356627.pdf
    • https://cdn.shopify.com/s/files/1/0430/8749/5321/files/golafozuxujogenujevilo.pdf
    • https://cdn.shopify.com/s/files/1/0435/5925/6225/files/carbon_cycle_worksheet_answers.pdf
    • https://cdn.shopify.com/s/files/1/0435/8792/8223/files/cambridge_dictionary_full.pdf
    • https://cdn.shopify.com/s/files/1/0432/1509/3924/files/vovalibofizunaloxo.pdf
    • https://cdn.shopify.com/s/files/1/0427/9474/6023/files/cantate_domino_vytautas_miskinis.pdf
    • https://cdn.shopify.com/s/files/1/0437/1863/9771/files/45081770571.pdf
    • https://cdn.shopify.com/s/files/1/0438/9643/8936/files/dotavaronakid.pdf
    • https://cdn.shopify.com/s/files/1/0437/8994/2945/files/band_theory_of_semiconductor.pdf
    • https://cdn.shopify.com/s/files/1/0437/6795/5610/files/55735826200.pdf
    • https://cdn.shopify.com/s/files/1/0432/8760/9497/files/smoke_and_ashes_abir_mukherjee.pdf
    • https://cdn.shopify.com/s/files/1/0432/4104/6171/files/92220350841.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_off00004cb8.bin
98f0031bbe924d2baaf1f12653c67db3ecdcf9dd745be8b6024df3aec266d177		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4CB8 4996 bytes
font_01_sfnt_off00005dc7.bin
a168d8e92911defcd6592439d45404b78e12565915a4a7d363e6b13ab0cce914		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5DC7 9964 bytes
font_02_sfnt_off00007fde.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7FDE 4324 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.