Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4a32081c86a084d…

MALICIOUS

PDF

41.3 KB Created: 2020-08-11 00:56:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: acec7f89bee6c28a30d9cff4c65f594c SHA-1: 5fe114a2e5b4f11a4b5a8a3dadfe0224b6fcc6cb SHA-256: b4a32081c86a084d0f6862c58e923ccb3d56eba1943f4300277a66649776ef1b
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 external resources, a technique often used to obscure malicious destinations. One critical heuristic identified a link to a known malicious redirector, and another flagged the document as a link farm. The document body, though partially corrupted, contains text related to research and PDF, suggesting a lure to disguise the malicious links. The primary malicious URL identified is https://ttraff.cc/pify?keyword=importance+of+demographic+profile+in+research+pdf.

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/pify?keyword=importance+of+demographic+profile+in+research+pdf
    • http://pabavo.ellijaymontessori.com/uploads/1/3/0/7/130775734/138087475c1fd6.pdf
    • http://files.ernesthatton.com/uploads/1/3/1/4/131453414/f8e2329b13.pdf
    • http://files.pof-addcallsettings.com/uploads/1/3/1/1/131164573/ninejerokog.pdf
    • http://files.keepcalmandreadon.org/uploads/1/3/2/6/132683289/638d5e60.pdf
    • https://cdn.shopify.com/s/files/1/0438/2405/4429/files/xeremirudule.pdf
    • https://cdn.shopify.com/s/files/1/0429/2739/0887/files/duzemafudularan.pdf
    • https://cdn.shopify.com/s/files/1/0433/0120/8232/files/navodaya_online_application_form.pdf
    • https://cdn.shopify.com/s/files/1/0434/0760/5923/files/52287424516.pdf
    • https://cdn.shopify.com/s/files/1/0434/5636/4709/files/the_black_cat_edgar_allan_poe.pdf
    • https://cdn.shopify.com/s/files/1/0427/4959/1718/files/fundamentals_of_chemical_reaction_engineering_solution_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/5974/8769/files/abc_in_french.pdf
    • https://cdn.shopify.com/s/files/1/0428/1165/4307/files/53262378744.pdf
    • https://cdn.shopify.com/s/files/1/0428/9144/4390/files/92855262688.pdf
    • https://cdn.shopify.com/s/files/1/0430/7825/4745/files/argala_stotram_in_gujarati.pdf
    • https://cdn.shopify.com/s/files/1/0429/3269/9302/files/article_1_to_395_in_english_download.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_off00006318.bin
b9bb4a66485a7c5ce39796ce876e6c3c1a26d55db40250160d5a87d4a4bb3291
pdf-font-stream PDF embedded font (sfnt) at offset 0x6318 5504 bytes
font_01_sfnt_off00007595.bin
6c3fe59ba359608e1ceaec2dc1bdf95521abf7f0b57bbe2666b396915d794fee
pdf-font-stream PDF embedded font (sfnt) at offset 0x7595 10192 bytes