Malicious PDF — malware analysis report

Static analysis result for SHA-256 06e39a246b8a49a4…

MALICIOUS

PDF

69.8 KB Created: 2020-08-05 00:16:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dd36f6593f21f84e5dd4273372e0e5f0 SHA-1: 482f43d3c5162f33750ca21c1fd43dd86a48fa6a SHA-256: 06e39a246b8a49a483da1b5bb61b89fb827c3d37f7d636029cf9b214a5db01d0
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs, with a critical heuristic identifying a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that mirrors the one flagged by the heuristic, suggesting an attempt to disguise malicious links. The presence of a large number of external PDF links further indicates a link farm or SEO spam tactic.

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=basic+ballet+terms+pdf
    • http://files.noypbc.co.nz/uploads/1/3/2/8/132814476/tisaka_jazeg_vopixorubazuj_didofafuxoz.pdf
    • http://files.piedpyper.com/uploads/1/3/1/3/131383544/1583568.pdf
    • http://files.neenahpowerlifting.com/uploads/1/3/0/8/130874612/pumib_lafisatokuj_venuxik.pdf
    • http://ruzafepi.cloverhillumc.org/uploads/1/3/0/9/130969204/rafimelapokev_laluduzexeniti.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/2738/1920/files/41542611742.pdf
    • https://cdn.shopify.com/s/files/1/0430/7825/4753/files/vawirejunofafiwutatevi.pdf
    • https://cdn.shopify.com/s/files/1/0435/9235/1907/files/jejisagisavebojexizoreru.pdf
    • https://cdn.shopify.com/s/files/1/0431/6109/2250/files/rubuxuzome.pdf
    • https://cdn.shopify.com/s/files/1/0431/3448/4648/files/wixuvizubizekuraneko.pdf
    • https://cdn.shopify.com/s/files/1/0437/3282/8314/files/xupabisisuxokero.pdf
    • https://cdn.shopify.com/s/files/1/0438/2595/4973/files/31962984711.pdf
    • https://cdn.shopify.com/s/files/1/0436/2534/9273/files/nunerejunejasuva.pdf
    • https://cdn.shopify.com/s/files/1/0432/0244/5475/files/beatles_sheet_music_piano_free.pdf
    • https://cdn.shopify.com/s/files/1/0434/7848/3096/files/merininadafaj.pdf
    • https://cdn.shopify.com/s/files/1/0437/8283/2280/files/43314897875.pdf
    • https://cdn.shopify.com/s/files/1/0428/6559/0438/files/enter_the_gungeon_arcane_gunpowder.pdf
    • https://cdn.shopify.com/s/files/1/0427/9985/7823/files/cancionero_cristiano_descargar.pdf
    • https://cdn.shopify.com/s/files/1/0437/1002/1787/files/jasajawilurojukojora.pdf
    • https://cdn.shopify.com/s/files/1/0429/2296/7207/files/buxemokejiwa.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_off0000cc95.bin
cdb851116079b2c1c990b0025390182423dc5dbd955d70d2e9e7452bc7b769b4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCC95 5492 bytes
font_01_sfnt_off0000df22.bin
16318c6acddf55fe181db3fc6dd78872b168ad73c6f7d9fc0175728fb9d31a7d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDF22 13828 bytes

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