Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd2a5c0281490058…

MALICIOUS

PDF

45.5 KB Created: 2020-08-22 08:51:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1ed3c3add2b9ddcfc4211f8ca1fe4b17 SHA-1: 38197aba05963b3a8263643bcf311679c252cbb2 SHA-256: fd2a5c0281490058aba6676646b6e18301138893fe8c1847ec01bc9bda13be42
152 Risk Score

Malware Insights

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

The PDF contains numerous links, including one to a known malicious redirector at ttraff.com, disguised with a "google slides templates halloween" keyword. This indicates a social engineering lure designed to redirect the user to malicious content. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is part of a phishing or malware distribution campaign.

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=google+slides+templates+halloween
    • http://files.trivalleysir34.org/uploads/1/3/1/8/131871625/fimavozozuxekibiki.pdf
    • http://files.inspiredwomenbusinessalliance.org/uploads/1/3/1/1/131163723/8871381.pdf
    • http://files.portraits4patriots.com/uploads/1/3/0/8/130874567/jewowimunokamobo.pdf
    • http://tolike.margtstudio.com/uploads/1/3/1/0/131070450/lopenobumedu-zutarufulin-majezodafoz-linaxe.pdf
    • http://files.cmjlawn.com/uploads/1/3/1/4/131406442/4743538.pdf
    • https://cdn.shopify.com/s/files/1/0437/9131/9200/files/senuxenimedamewizawotafuv.pdf
    • https://cdn.shopify.com/s/files/1/0431/3242/0264/files/firilofabuxapawaxe.pdf
    • https://cdn.shopify.com/s/files/1/0435/2894/5819/files/76663172204.pdf
    • https://cdn.shopify.com/s/files/1/0440/0765/3526/files/2004146632.pdf
    • https://cdn.shopify.com/s/files/1/0433/8375/0821/files/vcruntime140._dll_free_64_bit_windows_8.pdf
    • https://cdn.shopify.com/s/files/1/0431/5050/8181/files/sadlier_phonics_level_b_grade_2.pdf
    • https://cdn.shopify.com/s/files/1/0437/4170/8453/files/arabic_to_english_word_converter.pdf
    • https://cdn.shopify.com/s/files/1/0429/8443/9971/files/66010033397.pdf
    • https://cdn.shopify.com/s/files/1/0431/8589/7627/files/7691378979.pdf
    • https://cdn.shopify.com/s/files/1/0434/3581/9173/files/viravejofefowezasawerob.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_off00006724.bin
7cdddb61223fdfae7bda010e65d5de47f66fcc4f2aa2e59739dc17df5976c38a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6724 5188 bytes
font_01_sfnt_off000078bc.bin
664b3a00803a433533257d58aef8f5aa0cd9e1ffea0abe7d54fb589a8412f491		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78BC 9836 bytes
font_02_sfnt_off00009a5d.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9A5D 4324 bytes

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