Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c1d693c649cf7b0…

MALICIOUS

PDF

246.4 KB Created: 2020-08-05 03:59:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5cd4370942d7e4c20a4d192edf6ff585 SHA-1: ac27f3427253685b3d4056b594f25ea53015d1c5 SHA-256: 6c1d693c649cf7b0d4deaa5b15d0a030e70330c438a953a791fa83088afb01ab
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains a link to a known malicious redirector, ttraff.cc, which is disguised as a cadastral survey book. This lure, combined with the ML classifier and heuristics for advance-fee scams and browser installation lures, indicates a social engineering attack. The embedded URL is likely used to download and execute a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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=cadastral+survey+book+pdf
    • http://files.pst4y.org/uploads/1/3/0/7/130738814/piwagitasesesuwatug.pdf
    • http://files.instituteforlgbthealth.org/uploads/1/3/1/0/131071056/zanotikisipediw-zexugesazudix-vafigapijuman.pdf
    • http://noxasab.krisandandreawedding.com/uploads/1/3/2/7/132740930/moramal-kidopodilabapof-rapujamexekafi-bazaxezewonu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/6667/8686/files/bewimavewuvukegowu.pdf
    • https://cdn.shopify.com/s/files/1/0437/4803/2666/files/lexam.pdf
    • https://cdn.shopify.com/s/files/1/0439/8543/6830/files/toyota_aqua_2020_manual_english.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/38608120386.pdf
    • https://cdn.shopify.com/s/files/1/0434/5711/8374/files/widaximefakoguzosafelu.pdf
    • https://cdn.shopify.com/s/files/1/0429/9220/5978/files/2235281569.pdf
    • https://cdn.shopify.com/s/files/1/0434/4355/2416/files/setup_homepage_in_firefox.pdf
    • https://cdn.shopify.com/s/files/1/0430/7124/2391/files/compendium_of_the_emerald_tablets_billy_carson.pdf
    • https://cdn.shopify.com/s/files/1/0428/6503/3383/files/xotikatofanokakikol.pdf
    • https://cdn.shopify.com/s/files/1/0433/1569/1678/files/18843296274.pdf
    • https://cdn.shopify.com/s/files/1/0432/1984/5278/files/jidujetetimuziz.pdf
    • https://cdn.shopify.com/s/files/1/0433/5340/7646/files/puduvipe.pdf
    • https://cdn.shopify.com/s/files/1/0432/7335/5424/files/zonodenufikobu.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_off00038993.bin
7f460b6a5b1580262dec1292c319b0c9bf8cf2c2352cbfc33fbd92003cf2c520		 pdf-font-stream PDF embedded font (sfnt) at offset 0x38993 5308 bytes
font_01_sfnt_off00039bb4.bin
ea4ef5c38e5b2cefb93e917a4a3c23a898f29c0699a78ab74d0187b707f932d1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x39BB4 15120 bytes

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