Malicious PDF — malware analysis report

Static analysis result for SHA-256 8382637b04d7e8bf…

MALICIOUS

PDF

53.5 KB Created: 2020-08-24 10:18:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2bd96d6f6ca86f68d28b73b1af7e53bb SHA-1: 2d053577bc53125687650176d26a8cd829fa3b5f SHA-256: 8382637b04d7e8bf304440a423192fe88f6d2fb06fc1fc7a206a159ab4e2c346
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1204.002 Malicious Link

The PDF contains a lure related to IELTS writing samples, combined with heuristics indicating an advance-fee scam. It also features a link to a known malicious redirector, ttraff.com, which is likely used to funnel victims to a scam page. The document's structure and embedded links strongly suggest a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • 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.
  • 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.
  • 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=ielts+writing+sample+questions+and+answers+pdf
    • http://files.duke-consult.com/uploads/1/3/1/4/131454316/8273664.pdf
    • http://keninan.engstrumphotography.com/uploads/1/3/1/6/131606739/botakixikimapotup.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/3550/8392/files/nitenopipunafokovulo.pdf
    • https://cdn.shopify.com/s/files/1/0432/6375/4404/files/34371498745.pdf
    • https://cdn.shopify.com/s/files/1/0427/4988/6620/files/zavekozawusasow.pdf
    • https://cdn.shopify.com/s/files/1/0431/9815/2866/files/sijujomexavowom.pdf
    • https://cdn.shopify.com/s/files/1/0429/7549/4300/files/islam_dan_budaya_jawa.pdf
    • https://cdn.shopify.com/s/files/1/0436/4769/7056/files/kdigo_guidelines_2018_anemia.pdf
    • https://cdn.shopify.com/s/files/1/0435/4398/6340/files/fuloxufupasaxatoraxotoso.pdf
    • https://cdn.shopify.com/s/files/1/0439/3605/5454/files/fooled_around_and_fell_in_love_tab.pdf
    • https://cdn.shopify.com/s/files/1/0427/5427/7532/files/43145997532.pdf
    • https://cdn.shopify.com/s/files/1/0433/5878/1590/files/foxoladazitipig.pdf
    • https://cdn.shopify.com/s/files/1/0437/3096/0549/files/rizinizix.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_off00009334.bin
b750351190dbcfe19c3a66a741fa19ec6a8a0bcd0c97f66c244678d7bf4e837b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9334 5516 bytes
font_01_sfnt_off0000a5de.bin
f25321760d19f4aa81c211714eca6e2b4935e9b904875fdaf8197dfe52514dc7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA5DE 10220 bytes

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