Malicious PDF — malware analysis report

Static analysis result for SHA-256 d35cdca7fdcbf157…

MALICIOUS

PDF

33.4 KB Created: 2020-08-31 12:40:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5aaffad55df33580639b7a6235310ca5 SHA-1: 1fd44bf87088c29cec099717172a5d0e742c8692 SHA-256: d35cdca7fdcbf157882bedb18d3b4dec8128bcb7eacecd73186ea875770bdcf8
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with one pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the URL https://ttraff.com/wix?keyword=acca+f8+passcards+pdf, which is flagged as malicious. The presence of numerous external PDF links suggests a link farm or SEO manipulation tactic, potentially to obscure malicious activity or drive traffic to malicious sites.

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/wix?keyword=acca+f8+passcards+pdf
    • https://cdn.shopify.com/s/files/1/0431/0705/7825/files/tabla_de_derivadas_e_integrales.pdf
    • https://cdn.shopify.com/s/files/1/0463/2477/7122/files/guxafaditenixaz.pdf
    • https://cdn.shopify.com/s/files/1/0431/1298/8821/files/zuwixumebo.pdf
    • https://static.usrfiles.com/ugd/b8c837_ec46b9046ca94cfe850ab314226bdc4f.pdf
    • https://static.usrfiles.com/ugd/4dd980_e5b940e2886748c8908360e15f5daa13.pdf
    • https://static.usrfiles.com/ugd/912de2_504c3e36084d4a92bf123231cbd3767e.pdf
    • https://static.usrfiles.com/ugd/b8c837_76517ad3aae0491997d8781ec65862e6.pdf
    • https://static.usrfiles.com/ugd/6350c7_b048485982ad4eba9d29f969adf23751.pdf
    • https://cdn.shopify.com/s/files/1/0438/0455/7469/files/bolopuzojetu.pdf
    • https://cdn.shopify.com/s/files/1/0428/0716/5095/files/xetabemegesukuxus.pdf
    • https://cdn.shopify.com/s/files/1/0434/8834/6262/files/fenodinapironedukawewi.pdf
    • https://cdn.shopify.com/s/files/1/0445/4963/6255/files/96870942504.pdf
    • https://cdn.shopify.com/s/files/1/0439/6161/4494/files/gerao_de_energia_biomassa.pdf
    • https://cdn.shopify.com/s/files/1/0433/5563/5880/files/93741433270.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_off00004489.bin
489ada68b37ded0af6a1c2c35be4d612c9dd6c91d0afc0bab72b44cdd1c23952		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4489 5300 bytes
font_01_sfnt_off000056a9.bin
9c059ea4764660186b798584c047ca267baab499fa03acd19ac609ff97e489c8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x56A9 10732 bytes

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