Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c14427c9fd2c266…

MALICIOUS

PDF

40.9 KB Created: 2020-08-05 05:10:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 673794f861f30328df7059f3bbea5a83 SHA-1: 823cda3f3ac441be9029cccfb9d4effa0be4a0df SHA-256: 9c14427c9fd2c2660669196c8795ecacbba94c25933c2f1ece573696203d430d
120 Risk Score

Malware Insights

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

The PDF file was identified as a malicious redirector due to its extensive list of embedded links. The primary malicious URL, https://ttraff.ru/pify?keyword=cell+structure+prokaryotes+and+eukaryotes+pdf, is likely used to funnel users to further malicious content. The presence of numerous other links, many pointing to Shopify domains, suggests a link farm or SEO poisoning tactic to distribute malicious content. No scripts were extracted, but the heuristic firings strongly indicate a redirection-based attack.

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.ru/pify?keyword=cell+structure+prokaryotes+and+eukaryotes+pdf
    • http://boseg.poetic-healing.com/uploads/1/3/1/4/131482962/jabidufejazigiji.pdf
    • http://files.thekissinglipsofamerica.com/uploads/1/3/1/4/131437889/kalamapiloniweb.pdf
    • http://dofevifex.cmisafes.com/uploads/1/3/1/3/131380845/0f43143834.pdf
    • http://nenepe.westseattlecoworking.com/uploads/1/3/2/6/132682646/4883464.pdf
    • http://vixok.nicolakeenonstage.com/uploads/1/3/1/4/131438177/lamatimesadametifa.pdf
    • https://cdn.shopify.com/s/files/1/0432/8197/3416/files/pisalolisimafefid.pdf
    • https://cdn.shopify.com/s/files/1/0432/6254/1982/files/19176563240.pdf
    • https://cdn.shopify.com/s/files/1/0433/5747/0870/files/40995430617.pdf
    • https://cdn.shopify.com/s/files/1/0436/1011/2163/files/keresaselojab.pdf
    • https://cdn.shopify.com/s/files/1/0437/0428/7383/files/bikram_yoga_poses.pdf
    • https://cdn.shopify.com/s/files/1/0432/5313/7576/files/59260897737.pdf
    • https://cdn.shopify.com/s/files/1/0429/6579/4965/files/32261885826.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/97285982277.pdf
    • https://cdn.shopify.com/s/files/1/0435/8301/3023/files/advanced_engineering_electromagnetics_balanis_solutions_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/dipudakafadaned.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_off0000624f.bin
55b29e00d37022a44950537b521ea4d74a43ae236676da12c06385474c70ddf1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x624F 5220 bytes
font_01_sfnt_off0000742d.bin
b094edee7bb9cbeff07b587526c18342d35090255d782bd93c860b9bf608f59f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x742D 10092 bytes

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