Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9da95bb0d64db00…

MALICIOUS

PDF

41.8 KB Created: 2020-08-19 00:21:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f7fc71d252b7b7ed180f242595669ef6 SHA-1: ec97d7618352943bdc290b0a75cb8c2aaafc1c90 SHA-256: e9da95bb0d64db009cc6c69055aefb4cba6d5b84bf527530eb2d0486ad2fe57a
152 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by an ML classifier and contains a significant number of embedded links, with one pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/pify?keyword=bloons+td+battles+6+apk', which is also listed as a malicious redirector. The presence of numerous links suggests a link farm or a phishing attempt to lure users to external sites.

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=bloons+td+battles+6+apk
    • http://files.redcoyotecyclery.com/uploads/1/3/0/8/130874641/nuvevasugibadi.pdf
    • http://dijalew.robotic-renegades.org/uploads/1/3/0/9/130969242/sudemokupexiwop_ximoxevetado_vamotepavex.pdf
    • http://files.carlhlam.com/uploads/1/3/2/6/132695302/9dc912a40695d.pdf
    • http://pazabega.staging.cornrowsandco.com/uploads/1/3/1/3/131398083/xogakobimixo-mivagof.pdf
    • https://cdn.shopify.com/s/files/1/0432/8249/7701/files/1._5_2_minecraft_servers.pdf
    • https://cdn.shopify.com/s/files/1/0434/4558/4033/files/pulesalalube.pdf
    • https://cdn.shopify.com/s/files/1/0435/2756/9576/files/letters_sounds.pdf
    • https://cdn.shopify.com/s/files/1/0431/9015/7473/files/battle_royale_manga.pdf
    • https://cdn.shopify.com/s/files/1/0431/0319/1193/files/bodybuilding_workout_log.pdf
    • https://cdn.shopify.com/s/files/1/0433/8037/5704/files/absceso_testicular_tratamiento_antibiotico.pdf
    • https://cdn.shopify.com/s/files/1/0431/0673/0144/files/acuerdo_de_confidencialidad_mexico.pdf
    • https://cdn.shopify.com/s/files/1/0430/9378/6791/files/jetalogumopesetikete.pdf
    • https://cdn.shopify.com/s/files/1/0430/8349/7623/files/62373674435.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/76588695657.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000653e.bin
dc7972f35a4fa398c1161732eea2bf7e1ef331cca62a3dc9cef1b458de0f75bb
pdf-font-stream PDF embedded font (sfnt) at offset 0x653E 5264 bytes
font_01_sfnt_off0000772c.bin
4b23d5e80a65e00909ff585ed1925e71078c123e4052ddd82fa86be07dde7baf
pdf-font-stream PDF embedded font (sfnt) at offset 0x772C 10200 bytes