Malicious PDF — malware analysis report

Static analysis result for SHA-256 866040ac774d42cc…

MALICIOUS

PDF

47.3 KB Created: 2020-08-07 23:15:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bf3a09abe426cf67f1f32d53c59fd670 SHA-1: 6a488776d9ea8973b4d2a5da4deb118f548260e2 SHA-256: 866040ac774d42cc0f2dbc2d300e682ed4cdc6ec56a04253867b6ef2ffb58f2a
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 of which point to benign-looking documents hosted on Shopify. However, one critical link directs to a known malicious redirector at 'ttraff.com'. This suggests the document is part of a link farm or SEO poisoning campaign designed to redirect users to malicious sites. No scripts were extracted, but the primary attack vector is the malicious redirection.

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/pify?keyword=advanced+statistical+methods+for+the+analysis+of+large+data+sets+pdf
    • http://files.yatesclassroom.com/uploads/1/3/2/7/132741397/wusixivike-kafudimoj-fowuvib-xagit.pdf
    • http://files.cdconggiaovietnamvic.org/uploads/1/3/1/3/131398322/8998755.pdf
    • http://files.hopespringsfarm.org/uploads/1/3/1/3/131383892/zikuxujekorozojal.pdf
    • https://cdn.shopify.com/s/files/1/0435/2396/5080/files/alamo_drafthouse_winchester_menu.pdf
    • https://cdn.shopify.com/s/files/1/0440/0916/0862/files/15882270641.pdf
    • https://cdn.shopify.com/s/files/1/0438/0796/5345/files/thyristor_controlled_rectifier.pdf
    • https://cdn.shopify.com/s/files/1/0435/4211/8555/files/zepukinutapopizuzofirafob.pdf
    • https://cdn.shopify.com/s/files/1/0432/7276/5598/files/2383844870.pdf
    • https://cdn.shopify.com/s/files/1/0427/9166/5830/files/36176271111.pdf
    • https://cdn.shopify.com/s/files/1/0431/5886/4028/files/56764213055.pdf
    • https://cdn.shopify.com/s/files/1/0431/2875/0241/files/dezuruvasubovamobariwasij.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/31321710084.pdf
    • https://cdn.shopify.com/s/files/1/0429/5216/3482/files/xezukikekusesajetaxu.pdf
    • https://cdn.shopify.com/s/files/1/0429/2260/6759/files/56801676008.pdf
    • https://cdn.shopify.com/s/files/1/0438/0593/3730/files/past_simple_past_perfect_exercises_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0433/0913/8075/files/wukapinabasefewudo.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006a8c.bin
b93addafa162ce5b15ec5ffa5644504aeac39102a9e1e3f737632d5b07f95699
pdf-font-stream PDF embedded font (sfnt) at offset 0x6A8C 5508 bytes
font_01_sfnt_off00007d27.bin
f9b63fcc634aa950fd5d2dfeb71a69c245001793b530055153edf77267a6c0d9
pdf-font-stream PDF embedded font (sfnt) at offset 0x7D27 10624 bytes
font_02_sfnt_off0000a176.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3
pdf-font-stream PDF embedded font (sfnt) at offset 0xA176 4324 bytes