Malicious PDF — malware analysis report

Static analysis result for SHA-256 45f0ce6564886253…

MALICIOUS

PDF

41.5 KB Created: 2020-08-19 10:51:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2a3a78a3e9e10c567f7c50af0b97c40f SHA-1: c20b1de49ae49d551939cf1b905c1e03804728e1 SHA-256: 45f0ce6564886253681e42bbd0ac1385b2393c649d5c5f9a3927191d3883e500
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains the text 'Action crack free' and the malicious URL, suggesting a lure for cracked software. The PDF also contains a large number of external links, many pointing to Shopify domains, likely as part of a link farm to improve SEO for malicious content. The ML classifier also strongly flagged this PDF as malicious.

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.com/pify?keyword=action+crack++free
    • http://daberu.wastelandarade.com/uploads/1/3/1/3/131383651/tuzamatokazumen_nimut_direpiji_buxisi.pdf
    • http://tapiz.plumasearthdays.com/uploads/1/3/0/9/130969352/026938990b4d.pdf
    • http://files.mdchpc.org/uploads/1/3/0/7/130775624/ledes-mixajemuzukeref.pdf
    • http://rajobilan.lhseaglesbooster.com/uploads/1/3/1/6/131606490/zovozafogupit_sarifimedomodos_potewiweboga.pdf
    • https://cdn.shopify.com/s/files/1/0430/5757/8138/files/ap_biology_textbook_online.pdf
    • https://cdn.shopify.com/s/files/1/0429/4439/7468/files/68774793675.pdf
    • https://cdn.shopify.com/s/files/1/0429/7300/3939/files/6634375820.pdf
    • https://cdn.shopify.com/s/files/1/0431/9775/9643/files/durabenarugopuzado.pdf
    • https://cdn.shopify.com/s/files/1/0428/2135/3635/files/79020171106.pdf
    • https://cdn.shopify.com/s/files/1/0433/1870/6331/files/assertions_audit.pdf
    • https://cdn.shopify.com/s/files/1/0432/9363/8822/files/cid_moosa_movie_songs_free.pdf
    • https://cdn.shopify.com/s/files/1/0432/6319/7337/files/nursing_care_of_tracheostomy_patient.pdf
    • https://cdn.shopify.com/s/files/1/0431/7508/4193/files/16331572093.pdf
    • https://cdn.shopify.com/s/files/1/0438/7468/0987/files/zupakevawitolopid.pdf
    • https://cdn.shopify.com/s/files/1/0432/7368/3112/files/91032691577.pdf
    • https://cdn.shopify.com/s/files/1/0443/3536/6300/files/biotechnology_principles_and_processes_class_12_notes_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/8349/7621/files/chrome_shutdown_complete.pdf
    • https://cdn.shopify.com/s/files/1/0432/2361/3595/files/jusamezokesonoguxesi.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/
    • https://cdn.shopify.com/s/files/1/0432/2361/3595/files/jusamezokesonoguxesi

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006527.bin
9841af0b81f6f53af29df5a88372c70ce13f6d01fdeb7bdaac2a3dff796114e9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6527 4716 bytes
font_01_sfnt_off0000753b.bin
2d48cd73cc67529510e96681921b465d760570feb314242419baf835d20130d1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x753B 10532 bytes

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