Malicious PDF — malware analysis report

Static analysis result for SHA-256 982e86a4696f4c5b…

MALICIOUS

PDF

38.9 KB Created: 2020-08-15 17:47:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c0ee3304019df35dfe7e92a64a10866f SHA-1: bc2b24e6f2369a51df8d7c2714a713e2f34babf2 SHA-256: 982e86a4696f4c5be761f19798b0d1a9562cf97b94a08dca7f4b1dbb7b45965a
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector at ttraff.com. The document body, though heavily obfuscated, contains the text 'Dialogue shopping worksheet' and the malicious URL, suggesting a lure to a phishing or malware distribution site. The ML classifier strongly supports the malicious verdict.

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.com/wb?keyword=dialogue%20shopping%20worksheet
    • http://zusomopus.danbrambilla.com/uploads/1/3/1/3/131383544/beguxogi_befozawipixe.pdf
    • http://files.rocksolidcorporateevents.com/uploads/1/3/1/3/131384492/rubuxixided.pdf
    • http://files.ourhandmadelife.com/uploads/1/3/1/6/131607404/523b38d.pdf
    • https://cdn.shopify.com/s/files/1/0434/0521/3847/files/zobibekupat.pdf
    • https://cdn.shopify.com/s/files/1/0433/4557/6088/files/zobalujewaxij.pdf
    • https://cdn.shopify.com/s/files/1/0427/6856/4380/files/wipalakekuput.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/jenodilibaxu.pdf
    • https://cdn.shopify.com/s/files/1/0431/0233/9232/files/highway_to_heaven_season_5_episode_guide.pdf
    • https://cdn.shopify.com/s/files/1/0443/3536/6300/files/material_characterization_techniques_nptel.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/pejuzesuloroxutebed.pdf
    • https://cdn.shopify.com/s/files/1/0437/6880/7586/files/56964802138.pdf
    • https://cdn.shopify.com/s/files/1/0430/8706/9335/files/42578746743.pdf
    • https://cdn.shopify.com/s/files/1/0429/7375/7603/files/mewox.pdf
    • https://cdn.shopify.com/s/files/1/0431/9281/1681/files/16204711022.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_off00005b61.bin
b3fc1e6d8211ffbbf257e826b3ba52afc6e480ee4f4ec9173223193b46f257de		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B61 5236 bytes
font_01_sfnt_off00006d3a.bin
7eee190c28718b3c57867a37bb958b26f2f868dd0c648753eeec70570a8385fa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D3A 9864 bytes

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