Malicious PDF — malware analysis report

Static analysis result for SHA-256 9fe3ded096552e7f…

MALICIOUS

PDF

41.4 KB Created: 2020-08-23 00:41:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2395fb221baab0f19c84de43cee1b2d4 SHA-1: 0665e428958f7081f5963b463fa2800d02ee6a52 SHA-256: 9fe3ded096552e7fd6c51acbe21b07cebec6f8dc74ed494c2059cc6d798e4f21
154 Risk Score

Malware Insights

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

The PDF file was flagged by multiple critical heuristics indicating malicious redirector links and a link farm. The ML classifier also assigned a very high probability of maliciousness. The document body contains numerous embedded URLs, with the primary malicious redirector being ttraff.cc. This suggests the document's purpose is to lure users into clicking these links, leading them to potentially harmful content.

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/pify?keyword=german+shepherd+barking
    • http://files.illinoiscardinalsbaseball.com/uploads/1/3/2/6/132695568/kevuzibadinipe.pdf
    • https://cdn.shopify.com/s/files/1/0440/1112/6942/files/economic_budget_2020_in_marathi.pdf
    • https://cdn.shopify.com/s/files/1/0432/3010/1668/files/zemebige.pdf
    • https://cdn.shopify.com/s/files/1/0433/1126/7990/files/dokerixogiroxezex.pdf
    • https://cdn.shopify.com/s/files/1/0435/0243/6518/files/tarinu.pdf
    • http://wudik.shojitabuchigiftshop.square.site/uploads/1/3/0/7/130739017/9197569.pdf
    • https://cdn.shopify.com/s/files/1/0429/1438/1980/files/dusanuxolipugusiverer.pdf
    • https://cdn.shopify.com/s/files/1/0436/2177/7570/files/13146111460.pdf
    • https://cdn.shopify.com/s/files/1/0431/1613/4562/files/22927727280.pdf
    • https://cdn.shopify.com/s/files/1/0434/1461/8277/files/akra_lai_lai_ringtone.pdf
    • https://cdn.shopify.com/s/files/1/0435/5037/6100/files/29541925313.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/fenajowogotuxukat.pdf
    • https://cdn.shopify.com/s/files/1/0439/2671/6584/files/fogavilamuzibozixekopelo.pdf
    • https://cdn.shopify.com/s/files/1/0427/7121/8588/files/soxeb.pdf
    • https://cdn.shopify.com/s/files/1/0430/4489/6925/files/5364277614.pdf
    • https://cdn.shopify.com/s/files/1/0438/8572/3816/files/canon_camera_tutorials.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_off00006573.bin
f3bdcdabf1099b35e4dacb514dc8b6411acd20e3e91ced54c85ebba8efd2f91c
pdf-font-stream PDF embedded font (sfnt) at offset 0x6573 5576 bytes
font_01_sfnt_off00007835.bin
f837d0d7ae7790f34fae78b2252010ab1089e03e98ec5de406607e2cb580cbb2
pdf-font-stream PDF embedded font (sfnt) at offset 0x7835 9664 bytes