Malicious PDF — malware analysis report

Static analysis result for SHA-256 4fcc3a1845f69ad1…

MALICIOUS

PDF

34.5 KB Created: 2020-08-14 14:16:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 26ffb53482ce767bf7db9912eb91f50a SHA-1: 226b45473fca6ca03f1a3c0a8a35ffea19c18d73 SHA-256: 4fcc3a1845f69ad1d5589b4a59947e2cf8514c127d5b651ef29b0ca00cd008a1
154 Risk Score

Malware Insights

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

The PDF file was flagged by multiple critical heuristics indicating malicious redirector links and a link farm. The ML classifier also strongly indicated maliciousness. The document body contains numerous URLs, including a primary redirector URL to 'ttraff.ru' which is associated with malicious activity. The presence of a large number of embedded links suggests a tactic to distribute spam or lead users to malicious 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=winter+formal+dresses+for+13+year+olds
    • http://files.waxcustomjewelrystorepittsburgh.com/uploads/1/3/0/7/130740517/9587642.pdf
    • http://goremil.aliciadigiovanni.com/uploads/1/3/0/8/130874493/xonipowavu_zirifu_totojorinomaz_ruvafebuka.pdf
    • http://files.caitlincannonphotography.com/uploads/1/3/2/8/132814305/pavaxukirozi-sigakilegewekub-veranuxojewor.pdf
    • http://files.noplacelikeahome.com/uploads/1/3/1/4/131406222/6182408.pdf
    • https://cdn.shopify.com/s/files/1/0430/9116/5333/files/lafabejemodafevamigugurij.pdf
    • https://cdn.shopify.com/s/files/1/0436/0906/3582/files/87211110590.pdf
    • https://cdn.shopify.com/s/files/1/0432/8924/7894/files/jboss_application_server_7_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0427/4506/9724/files/athlean_x_workout_download_free.pdf
    • https://cdn.shopify.com/s/files/1/0430/1930/5113/files/43146559201.pdf
    • https://cdn.shopify.com/s/files/1/0433/4059/5355/files/36613213487.pdf
    • https://cdn.shopify.com/s/files/1/0431/0401/0389/files/convert._docx_to.pdf
    • https://cdn.shopify.com/s/files/1/0435/0686/0187/files/64239161302.pdf
    • https://cdn.shopify.com/s/files/1/0438/0455/7469/files/97919567308.pdf
    • https://cdn.shopify.com/s/files/1/0435/2117/9802/files/rajojinowan.pdf
    • https://cdn.shopify.com/s/files/1/0434/5197/3799/files/7_point_container_inspection.pdf
    • https://cdn.shopify.com/s/files/1/0434/4214/3397/files/linkedin_phishing_email_template.pdf
    • https://cdn.shopify.com/s/files/1/0429/2729/2582/files/68627888895.pdf
    • https://cdn.shopify.com/s/files/1/0432/9940/5977/files/sexiguzifokobigelarabid.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_off00004a4d.bin
693ce0874c499f00ae22bd1f55552611ccee921904986d466e0336dc54f9d46a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4A4D 5384 bytes
font_01_sfnt_off00005c95.bin
c5a7587b3974660759324636674838e46ffc1971322b56c05dc3ea615f36118d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C95 9432 bytes

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