Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b3e524021e3e079…

MALICIOUS

PDF

39.5 KB Created: 2020-08-12 19:13:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f138ccd82d2d0baaca3788350d00e38f SHA-1: 6a57ad06d5c2eeba44bcf150ec9272d3c74f1b79 SHA-256: 8b3e524021e3e079f81c35c687f7129e0766ff17ee6114124c351cd677a0c3cd
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many pointing to Shopify domains, which are part of a link farm designed to distribute content. One critical heuristic identified a link to a known malicious redirector, ttraff.cc, which is likely used to funnel users to malicious sites. The document body, though partially corrupted, contains keywords related to free downloads, reinforcing the lure. No scripts were extracted, but the primary attack pattern involves redirecting users through a series of links, likely to a final malicious payload.

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.cc/wb?keyword=ruthless%20anne%20stuart%20pdf%20free%20download
    • http://files.nysmaplepartridge.com/uploads/1/3/1/3/131379615/vutupilapisimopupibu.pdf
    • http://files.mochisu.com/uploads/1/3/1/3/131381078/2359537.pdf
    • http://files.ralflittle.com/uploads/1/3/1/4/131483108/lakeja-tewam-vuboramigusoge.pdf
    • http://files.cameliascandles.com/uploads/1/3/0/8/130815009/06b6b2b0c061f.pdf
    • http://files.nsacchitella.studio/uploads/1/3/0/7/130775515/7d5235.pdf
    • https://cdn.shopify.com/s/files/1/0440/7571/2664/files/nizowonal.pdf
    • https://cdn.shopify.com/s/files/1/0433/6877/5841/files/windows_live_sycn.pdf
    • https://cdn.shopify.com/s/files/1/0433/2807/7992/files/lupek.pdf
    • https://cdn.shopify.com/s/files/1/0432/2590/7368/files/bonemujokode.pdf
    • https://cdn.shopify.com/s/files/1/0432/3239/5426/files/xikikipujis.pdf
    • https://cdn.shopify.com/s/files/1/0440/2728/1558/files/fijiri.pdf
    • https://cdn.shopify.com/s/files/1/0428/1607/7991/files/gakojuniledosuxolobojafim.pdf
    • https://cdn.shopify.com/s/files/1/0440/0319/7078/files/doronosixomo.pdf
    • https://cdn.shopify.com/s/files/1/0430/3867/1010/files/sesafawobasave.pdf
    • https://cdn.shopify.com/s/files/1/0436/0352/5794/files/fuck_me_sideways.pdf
    • https://cdn.shopify.com/s/files/1/0438/0613/0337/files/19326498473.pdf
    • https://cdn.shopify.com/s/files/1/0435/0047/0438/files/85001524200.pdf
    • https://cdn.shopify.com/s/files/1/0438/2756/0610/files/stephen_king_the_jaunt_full_text.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_off00005cc7.bin
1f6911c985de18e035d8eb5936eb7d8ccd084504ee443582b5baa74ae800b4da		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5CC7 5228 bytes
font_01_sfnt_off00006e99.bin
3aadefe7deedaf214f0ff521e6d67c4b6b55b9f2ea7102314a3746b8df42ee80		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E99 10180 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.