Malicious PDF — malware analysis report

Static analysis result for SHA-256 2955dfc106c3e94b…

MALICIOUS

PDF

53.6 KB Created: 2020-08-17 15:54:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3d6780f425bcf5e07f633cd519efa361 SHA-1: ce95a8c68c7b454a42c834eef6c0c67238fe55e8 SHA-256: 2955dfc106c3e94b03c1b7f65b41a8407816c516059e440d127ed1f140576f4a
128 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a lure related to 'appsc group 2 syllabus 2019 pdf' and includes a critical heuristic firing for a malicious redirector link. The document body also contains numerous embedded URLs, many pointing to Shopify, but one critical URL redirects to `ttraff.ru`. This suggests a phishing attempt where the user is tricked into downloading a syllabus, but is instead redirected to malicious infrastructure.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=appsc+group+2+syllabus+2019+pdf
    • http://tijava.kylydianmusic.com/uploads/1/3/0/7/130775455/ranerorodorafed.pdf
    • http://nogawof.daenalc.com/uploads/1/3/1/4/131482826/dozep.pdf
    • https://cdn.shopify.com/s/files/1/0446/6386/5497/files/36049565692.pdf
    • https://cdn.shopify.com/s/files/1/0435/4444/5092/files/52940867063.pdf
    • https://cdn.shopify.com/s/files/1/0452/1653/0589/files/30175128617.pdf
    • https://cdn.shopify.com/s/files/1/0437/3810/3962/files/2665868837.pdf
    • https://cdn.shopify.com/s/files/1/0434/1468/3813/files/34288992591.pdf
    • https://cdn.shopify.com/s/files/1/0437/1536/2984/files/vukozixu.pdf
    • https://cdn.shopify.com/s/files/1/0441/0513/8328/files/converting_eu_to_rf.pdf
    • https://cdn.shopify.com/s/files/1/0429/8221/1733/files/what_are_some_examples_of_nonpolar_molecules.pdf
    • https://cdn.shopify.com/s/files/1/0429/9853/0202/files/tosogiwiketajafunen.pdf
    • https://cdn.shopify.com/s/files/1/0430/8788/8545/files/jakike.pdf
    • https://cdn.shopify.com/s/files/1/0431/4575/6821/files/dejuwawazupevuwekawi.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006db6.bin
06b0092e8a67e04f8a1313ffd37b836813eade630be525617534b0850159d7a0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DB6 6036 bytes
font_01_sfnt_off00008255.bin
7f656c823234179679de470a1b515cd123cf29081e8424504f436f27b555a4f1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8255 8184 bytes
font_02_sfnt_off00009adb.bin
416977b50c035c29c1b41c1db22a6a5fc47780d185652d34d8db4c025bd0e96a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9ADB 14184 bytes

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