Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef46a64610faf689…

MALICIOUS

PDF

33.1 KB Created: 2020-08-19 05:40:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0ed51551d3a3100e391a510b2ddf4817 SHA-1: 42056651fd599596f4569953021870807f4bd6be SHA-256: ef46a64610faf6897ae995844013c01f1995e5d2d0c18676e1b0baf238ad9b76
152 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, which is likely used to obscure the final destination. The document body, though heavily obfuscated, contains the same search query and URLs as found in the heuristics, suggesting a lure to a malicious site. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the presence of a malicious redirector and a link farm points to a phishing or scam attempt.

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=chhota+bheem+cartoon+video++bestwap
    • http://bixuja.haortizlaw.com/uploads/1/3/0/8/130814011/9718618.pdf
    • http://jikiwajim.supherblendz.com/uploads/1/3/2/6/132683051/3777862.pdf
    • http://xujonigex.mrskatiabendek.com/uploads/1/3/2/6/132680813/4a0262616edf1.pdf
    • http://files.arbenzworld.com/uploads/1/3/1/1/131163667/c3161480ea1c06.pdf
    • https://cdn.shopify.com/s/files/1/0445/3256/4132/files/gopigiredamabujemanuw.pdf
    • https://cdn.shopify.com/s/files/1/0444/3412/9062/files/2386137829.pdf
    • https://cdn.shopify.com/s/files/1/0434/5308/7911/files/multivariate_time_series_analysis_in_r.pdf
    • https://cdn.shopify.com/s/files/1/0434/5180/9957/files/idontwannabeyouanymore_chords_piano.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/juzopuzenafososokazulu.pdf
    • https://cdn.shopify.com/s/files/1/0431/8789/6488/files/70531184013.pdf
    • https://cdn.shopify.com/s/files/1/0433/6628/5464/files/33519543788.pdf
    • https://cdn.shopify.com/s/files/1/0431/8268/6370/files/koworuximexilubijitorepi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/98559129476.pdf
    • https://cdn.shopify.com/s/files/1/0429/5763/5735/files/mobogenie_apps_and_games.pdf
    • https://cdn.shopify.com/s/files/1/0433/9548/1754/files/wanedis.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_off00004418.bin
868cf95c5e6089338704366408c4fb08b9485694d8ef240c9822bb4e21967ce5
pdf-font-stream PDF embedded font (sfnt) at offset 0x4418 5480 bytes
font_01_sfnt_off000056a5.bin
79a624ed4afffd5dcae3b60b48f1600dde06956b7b191ecaa83705cebbeafd68
pdf-font-stream PDF embedded font (sfnt) at offset 0x56A5 10104 bytes