Malicious PDF — malware analysis report

Static analysis result for SHA-256 fdd876494aad4d54…

MALICIOUS

PDF

42.7 KB Created: 2020-08-30 08:29:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3d70e6ed6b16ec2b817effa80c8b689b SHA-1: 39293c25bd900ec5b57a44db7a3bc565afbe1223 SHA-256: fdd876494aad4d541d7b01dc9c4d325ecb7dabb33b2869bf90b2c7bf760b85c3
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 URLs, with a critical heuristic firing indicating a PDF link farm. One of these links, 'https://ttraff.com/wix?keyword=erase+una+vez+una+fabrica+ideas+principales', is flagged as malicious. The document body, though heavily obfuscated, also contains this URL and numerous other links to Shopify-hosted PDFs, suggesting a coordinated effort to manipulate search engine results or distribute further malicious content.

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=erase+una+vez+una+fabrica+ideas+principales
    • https://cdn.shopify.com/s/files/1/0435/3051/8682/files/sufakuju.pdf
    • https://cdn.shopify.com/s/files/1/0434/4463/3750/files/5736426367.pdf
    • https://cdn.shopify.com/s/files/1/0431/4356/1384/files/14156620635.pdf
    • https://cdn.shopify.com/s/files/1/0433/7437/9157/files/punuzujesulategasiduturel.pdf
    • https://cdn.shopify.com/s/files/1/0436/2888/8227/files/burnout_book.pdf
    • https://cdn.shopify.com/s/files/1/0432/9721/0532/files/92647302819.pdf
    • https://cdn.shopify.com/s/files/1/0433/5419/4085/files/abhimaan_movie_song_ming.pdf
    • https://cdn.shopify.com/s/files/1/0438/8261/0843/files/mri_bankers_guide.pdf
    • https://cdn.shopify.com/s/files/1/0433/0133/9304/files/calculus_and_its_applications_11th_edition_solutions.pdf
    • https://cdn.shopify.com/s/files/1/0432/5208/9000/files/milekufopupuda.pdf
    • https://static.usrfiles.com/ugd/b8c837_7a9a48cdaf0d4a12b9854da07d65e756.pdf
    • https://static.usrfiles.com/ugd/3e87bf_74b96831c66440799143aee04171d545.pdf
    • https://static.usrfiles.com/ugd/0df15e_f1b35662c81d4342936243725d1b53c1.pdf
    • https://static.usrfiles.com/ugd/b77b08_37a1b866df2c47d7b42fa497bc9273fc.pdf
    • https://static.usrfiles.com/ugd/b8c837_1bf73c9469a149e29844297101e16ec4.pdf
    • https://cdn.shopify.com/s/files/1/0431/0263/4148/files/gosofakolafa.pdf
    • https://cdn.shopify.com/s/files/1/0437/1588/7256/files/asante_kingdom.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_off0000662d.bin
76fd3b584fe0558b79ca9751e6062ec8a3c2f2e9b5f203fa915d21a830b2db34
pdf-font-stream PDF embedded font (sfnt) at offset 0x662D 5356 bytes
font_01_sfnt_off00007870.bin
a4ed5359189fb0e4a6220a7bcb936e64242b1639a1a60a6b8057cc7e5590f841
pdf-font-stream PDF embedded font (sfnt) at offset 0x7870 11004 bytes