Malicious PDF — malware analysis report

Static analysis result for SHA-256 028f30d21891039b…

MALICIOUS

PDF

42.6 KB Created: 2020-08-09 20:32:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 758fdc7b73212d9794b80daad33ea185 SHA-1: 9557dd41cae62bbba3013aa9b7dec086252f9ae6 SHA-256: 028f30d21891039b8b8435cc9be037afed85e9ebd2e2cba31420eae4755d12a5
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by multiple critical heuristics indicating malicious redirector infrastructure and a link farm. It contains numerous embedded URLs, with one pointing to a known malicious redirector. The primary purpose appears to be SEO manipulation or content distribution via a link farm, rather than direct user interaction.

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=vias+de+administracion+y+absorcion+de+farmacos+pdf
    • http://files.crystalbluffs.com/uploads/1/3/0/8/130874110/7936978.pdf
    • http://lotokevad.tccoloradobaseball.com/uploads/1/3/1/4/131409090/cba96160e553d8.pdf
    • http://files.newparanormalinvestigators.com/uploads/1/3/2/3/132303035/98dd27982faf.pdf
    • http://files.whitebgallery.com/uploads/1/3/1/6/131637043/zagupuzegeresu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/7922/8837/files/46730493823.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/domamusuvusuzexi.pdf
    • https://cdn.shopify.com/s/files/1/0429/6186/2810/files/physics_principles_and_problems.pdf
    • https://cdn.shopify.com/s/files/1/0433/4462/5822/files/irish_bagpipe_tunes.pdf
    • https://cdn.shopify.com/s/files/1/0430/4610/9345/files/tepevijekitidoperal.pdf
    • https://cdn.shopify.com/s/files/1/0438/2579/1133/files/aspire_3_a315_54.pdf
    • https://cdn.shopify.com/s/files/1/0433/1087/4777/files/tuwogotodavujuviraseri.pdf
    • https://cdn.shopify.com/s/files/1/0433/4649/3605/files/wonaxinujejivij.pdf
    • https://cdn.shopify.com/s/files/1/0430/2359/7725/files/destiny_2_air_move.pdf
    • https://cdn.shopify.com/s/files/1/0437/8394/6397/files/xedowezogab.pdf
    • https://cdn.shopify.com/s/files/1/0427/5824/2470/files/zamuzogejetunekimupikivo.pdf
    • https://cdn.shopify.com/s/files/1/0427/7121/8588/files/bin_sachivalay_clerk_book_world_inbox.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000664c.bin
b87fb8373d1cc2732c623cc46e60fb97f18604ffdd427899ad251c189ca68e40
pdf-font-stream PDF embedded font (sfnt) at offset 0x664C 5476 bytes
font_01_sfnt_off000078dd.bin
5b2818d86fdcf176e9773167c22c12c9f21f3562c0f8112151af61e4166a7d03
pdf-font-stream PDF embedded font (sfnt) at offset 0x78DD 10628 bytes