Malicious PDF — malware analysis report

Static analysis result for SHA-256 da9c630af73cc477…

MALICIOUS

PDF

49.2 KB Created: 2020-08-26 12:09:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7a3c89325fcd2f1d0b7f48f0d06bbb53 SHA-1: fdf239e9ea71d5932f2ea9b3c348a0064731fccf SHA-256: da9c630af73cc477fc9bf82a5cfcce49efb820795e082c3721df26c4f7e47184
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.cc/pify?keyword=resolucion+de+problemas+para+preescolar'. This indicates an attempt to direct the user to a malicious site. Additionally, the PDF exhibits characteristics of a link farm, with numerous embedded links, many pointing to Shopify domains. The document body, though partially corrupted, contains the same redirector URL, reinforcing the malicious intent. The primary attack pattern involves luring the user to click the malicious link.

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=resolucion+de+problemas+para+preescolar
    • http://files.mobile-autoelectrical.com/uploads/1/3/1/8/131856498/fc1fb.pdf
    • https://cdn.shopify.com/s/files/1/0428/0621/4819/files/bimujemudimuvimewenekoses.pdf
    • https://cdn.shopify.com/s/files/1/0439/3123/8568/files/98119784089.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/51851907441.pdf
    • https://cdn.shopify.com/s/files/1/0428/3380/5471/files/bribie_island_map.pdf
    • https://cdn.shopify.com/s/files/1/0432/3459/0888/files/33254804398.pdf
    • https://cdn.shopify.com/s/files/1/0454/5907/9318/files/kuwirutoge.pdf
    • https://cdn.shopify.com/s/files/1/0432/1456/9632/files/axiom_verge_secret_world_guide.pdf
    • https://cdn.shopify.com/s/files/1/0431/5702/9019/files/96003458128.pdf
    • https://cdn.shopify.com/s/files/1/0430/7684/5728/files/all_of_me_piano_sheet_music_easy_free.pdf
    • https://cdn.shopify.com/s/files/1/0440/7482/7941/files/69237234614.pdf
    • https://cdn.shopify.com/s/files/1/0432/8236/6629/files/muvedefuragig.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/beloromawodosuxaso.pdf
    • https://cdn.shopify.com/s/files/1/0433/1238/2116/files/buwotezolipikaxawofotirul.pdf
    • https://cdn.shopify.com/s/files/1/0431/7013/6218/files/jidedurokudoloxizozan.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006a7c.bin
f07e59550cec0ab3385239c93dbb2a1fe1c38e460b9d2d0d56ca594d223ce558
pdf-font-stream PDF embedded font (sfnt) at offset 0x6A7C 5364 bytes
font_01_sfnt_off00007c92.bin
05d9bc9f5ab2f5a1ab947d6fb2e07391afbcefc063d04fdc7dc58affabba0a0d
pdf-font-stream PDF embedded font (sfnt) at offset 0x7C92 10828 bytes
font_02_sfnt_off0000a00c.bin
531e37f64a2e7dc3bfb257675d9e6c644c7b1597f33ba9a969cd005a7ed65660
pdf-font-stream PDF embedded font (sfnt) at offset 0xA00C 16312 bytes