Malicious PDF — malware analysis report

Static analysis result for SHA-256 094672df464566fa…

MALICIOUS

PDF

45.0 KB Created: 2020-08-26 11:40:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1bfc0a1854c8674af8a3c152bd67ae71 SHA-1: aba4c0fdbda9f2c60c506c44cd545c5008f46ac0 SHA-256: 094672df464566fad89dbaf2790550d7e84261be288445934c2a81cede4762a2
154 Risk Score

Malware Insights

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

The PDF contains embedded links that are part of a link farm, with one critical link pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text suggesting a lure for downloading media, and the primary malicious URL is associated with a keyword related to media downloads. The presence of embedded URLs and the ML classifier's high confidence score indicate a malicious intent to redirect users to harmful content.

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.com/pify?keyword=bad+moms+mp4+download
    • http://ruxile.oyezbookstore.com/uploads/1/3/1/8/131872225/xodosejet.pdf
    • http://files.instinct-ready.com/uploads/1/3/1/8/131856632/4812927.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/8699/5863/files/57579522660.pdf
    • https://cdn.shopify.com/s/files/1/0432/5313/7563/files/biriwobitexobabofedepu.pdf
    • https://cdn.shopify.com/s/files/1/0437/3381/1351/files/bodazorosuretil.pdf
    • https://cdn.shopify.com/s/files/1/0437/7572/1633/files/jilafa.pdf
    • https://cdn.shopify.com/s/files/1/0429/3269/9302/files/16514014340.pdf
    • https://cdn.shopify.com/s/files/1/0431/5611/1520/files/game_online_android_hack_mod.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/30072581460.pdf
    • https://cdn.shopify.com/s/files/1/0431/2655/4780/files/beat_hip_hop_music.pdf
    • https://cdn.shopify.com/s/files/1/0430/6753/9623/files/31988685130.pdf
    • https://cdn.shopify.com/s/files/1/0437/8250/4600/files/enhancing_qualitative_characteristics_of_information.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_off00007118.bin
226fd206cca45cae87c50ff74b6830c2777560319a2c809aa3cd3a9e5b017493
pdf-font-stream PDF embedded font (sfnt) at offset 0x7118 5240 bytes
font_01_sfnt_off000082f0.bin
7c3588378fa1b620c18913919fa6281abe52827a9d307b137f302011db7b7d1a
pdf-font-stream PDF embedded font (sfnt) at offset 0x82F0 10744 bytes