Malicious PDF — malware analysis report

Static analysis result for SHA-256 2835f61449f94e99…

MALICIOUS

PDF

41.7 KB Created: 2020-08-19 14:53:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: add1b27d3b7bace8902d47f8751971c7 SHA-1: db63d11887176fac127940e371407207fb489dae SHA-256: 2835f61449f94e996b58926b84be07f11ae48f86a3e6f5ed37016e7379a20539
150 Risk Score

Malware Insights

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

The PDF contains a link farm and a critical redirector link pointing to ttraff.cc, indicating a phishing or malicious redirection attempt. The document body, though partially corrupted, suggests a lure related to a 'significant figures worksheet chemistry'. The presence of numerous external links, many hosted on Shopify, further supports the link farm heuristic. No scripts were extracted, but the PDF structure and embedded links are sufficient to infer a malicious redirection attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=significant+figures+worksheet+chemistry+if8766
    • http://files.ashlandcountytowninsurance.com/uploads/1/3/0/8/130873851/3588413.pdf
    • http://dixufidew.verdeywg.shop/uploads/1/3/1/4/131452839/govavukuxexinolonep.pdf
    • https://cdn.shopify.com/s/files/1/0430/5905/2706/files/mewujitogebun.pdf
    • https://cdn.shopify.com/s/files/1/0437/1103/7589/files/rajamug.pdf
    • https://cdn.shopify.com/s/files/1/0438/7799/0568/files/hiv_aids_full_information_in_marathi.pdf
    • https://cdn.shopify.com/s/files/1/0431/0653/3527/files/rukago.pdf
    • https://cdn.shopify.com/s/files/1/0430/3483/7149/files/augmented_reality_app_development_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0431/2753/7828/files/extent_report_in_pom_testng.pdf
    • https://cdn.shopify.com/s/files/1/0432/4062/0200/files/51790229336.pdf
    • https://cdn.shopify.com/s/files/1/0437/7870/3518/files/tl431_datasheet.pdf
    • https://cdn.shopify.com/s/files/1/0433/4839/4143/files/2138930924.pdf
    • https://cdn.shopify.com/s/files/1/0428/3337/9487/files/gelawelovesugelosu.pdf
    • https://cdn.shopify.com/s/files/1/0433/9400/7191/files/vixofinizifaxeri.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000062d2.bin
3fbddbabac7ae7c0d25cfe1e7b3d13038cc78003fd2300c44f10a46024ed11a8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62D2 6052 bytes
font_01_sfnt_off00007761.bin
8b3ef869ada6e777178617fe52d35f602b0282820948c35c52d136cce0bdab20		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7761 10144 bytes

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