Malicious PDF — malware analysis report

Static analysis result for SHA-256 bdf28cd30d93688f…

MALICIOUS

PDF

45.4 KB Created: 2020-08-10 17:59:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4ce8ddf08b2159d29b97d189b2128c88 SHA-1: 6976efa2c6accf2da5c2af4a8970b9a8b3fae999 SHA-256: bdf28cd30d93688f05084ab92ac37f1433749b5257f361856e6a7ce47414848b
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.com/pify?keyword=speak+up+textbook+pdf'. Additionally, it exhibits a PDF link farm heuristic, with numerous links to shopify.com domains, suggesting an attempt to distribute content or mask malicious activity. The document body, though heavily corrupted, contains the phrase 'Speak up textbook pdf' and the malicious URL, reinforcing the lure.

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/pify?keyword=speak+up+textbook+pdf
    • http://files.maryanndidriksen.com/uploads/1/3/1/3/131384432/2945282.pdf
    • http://files.isimplyloveit.com/uploads/1/3/0/9/130970003/1d3e4858ab74.pdf
    • http://files.just-verandas.com/uploads/1/3/1/3/131379045/xobuxisedujus_wekabod.pdf
    • http://files.limousinesdallas.net/uploads/1/3/0/7/130739143/foritujavalidaf.pdf
    • https://cdn.shopify.com/s/files/1/0437/0454/9544/files/business_driven_information_systems_3e.pdf
    • https://cdn.shopify.com/s/files/1/0431/8016/3227/files/luzujevugekabama.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/reragijod.pdf
    • https://cdn.shopify.com/s/files/1/0435/0102/7493/files/mafarapenanexe.pdf
    • https://cdn.shopify.com/s/files/1/0434/3840/7845/files/nifapijogote.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/59526866216.pdf
    • https://cdn.shopify.com/s/files/1/0431/7573/9553/files/wiped.pdf
    • https://cdn.shopify.com/s/files/1/0440/8039/8486/files/zavufolu.pdf
    • https://cdn.shopify.com/s/files/1/0447/5600/9111/files/costume_store_jacksonville_fl.pdf
    • https://cdn.shopify.com/s/files/1/0429/2437/6227/files/santa_baby_sheet_music_free.pdf
    • https://cdn.shopify.com/s/files/1/0430/8035/1897/files/85062604971.pdf
    • https://cdn.shopify.com/s/files/1/0427/8370/3206/files/fepewafosemuvixuvufi.pdf
    • https://cdn.shopify.com/s/files/1/0439/4795/0248/files/2963550808.pdf
    • https://cdn.shopify.com/s/files/1/0430/7727/1716/files/kokuzezexosurifudugaz.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_off00007547.bin
c1e135a0b1ef011c3fcc490c3d58ef318a520846fa38dc25133099fe276dd2ce
pdf-font-stream PDF embedded font (sfnt) at offset 0x7547 5104 bytes
font_01_sfnt_off000086b7.bin
89db4c5f5dee0fe70f1b7c2a2c17ef2d405417510dc5c8e23d3922275d0944eb
pdf-font-stream PDF embedded font (sfnt) at offset 0x86B7 9860 bytes