Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca3b571ad8565b86…

MALICIOUS

PDF

49.6 KB Created: 2020-09-02 06:27:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a15aa8432e8927d8710e463abe447da7 SHA-1: 358e09bdf8e81071c4ab50187585128308dfbe4d SHA-256: ca3b571ad8565b86e05a6f297aa0db636e704ad5678828c23377da3d6bd47178
150 Risk Score

Malware Insights

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

The PDF file was flagged by multiple critical heuristics for containing a malicious redirector link and a large number of external links, suggesting a link farm. The primary malicious URL identified is ttraff.cc, which is known for redirecting to malicious content. The document body itself is heavily obfuscated and contains numerous embedded URLs, reinforcing the attack pattern of a link-based lure.

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.cc/wix?keyword=ff%2526+e+schedule+template
    • https://cdn.shopify.com/s/files/1/0429/5743/9129/files/nes_emulator_for_laptop_free.pdf
    • https://cdn.shopify.com/s/files/1/0430/5397/3657/files/elgin_outboard_motor_manual.pdf
    • https://cdn.shopify.com/s/files/1/0434/6229/5714/files/zuvenupixi.pdf
    • https://cdn.shopify.com/s/files/1/0431/2629/2629/files/xamonep.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/sarexomerowomowubufo.pdf
    • https://static.usrfiles.com/ugd/35c6e2_7b8ce93ac0234583b3c1a6365dcc0426.pdf
    • https://static.usrfiles.com/ugd/5ed537_b612e2e36c024f998282338108b03dd5.pdf
    • https://static.usrfiles.com/ugd/784815_9c68fa4918e3485dbec330d05efb9cb8.pdf
    • https://static.usrfiles.com/ugd/7f16bd_0ff81ba58c894faf91d5fec4a2de53ee.pdf
    • https://static.usrfiles.com/ugd/b8c837_9d182c68761f4d3dbbcebd6bda54b7eb.pdf
    • https://cdn.shopify.com/s/files/1/0432/0306/8068/files/450376905.pdf
    • https://cdn.shopify.com/s/files/1/0436/3016/6176/files/14927691460.pdf
    • https://cdn.shopify.com/s/files/1/0440/1351/9006/files/elf_hydrating_sheet_mask_review.pdf
    • https://cdn.shopify.com/s/files/1/0431/7885/2503/files/duzawemovorofozaxun.pdf
    • https://cdn.shopify.com/s/files/1/0440/8098/8325/files/mri_anatomy_knee.pdf
    • https://cdn.shopify.com/s/files/1/0428/8220/3801/files/53278664539.pdf
    • https://cdn.shopify.com/s/files/1/0437/5805/9674/files/les_centrales_thermiques.pdf
    • https://cdn.shopify.com/s/files/1/0431/3884/2779/files/77639065072.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_off000087e3.bin
86c531ee83ad8f26f673cce3d5af720490e81250bd13f9c28854d88d3da1d111
pdf-font-stream PDF embedded font (sfnt) at offset 0x87E3 4196 bytes
font_01_sfnt_off00009636.bin
d5d2a673887f78c6f8f33ab94c793e00ce9f0da6724a12ee1a6f3751d3489ace
pdf-font-stream PDF embedded font (sfnt) at offset 0x9636 10700 bytes