Malicious PDF — malware analysis report

Static analysis result for SHA-256 308a2d290425ceb5…

MALICIOUS

PDF

54.2 KB Created: 2020-08-18 17:02:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4a3b343fb06f775d180a1844e4d360bc SHA-1: ec69d0061703bfdc51b88bbeebf735639ab08a0f SHA-256: 308a2d290425ceb5df85a1a3397f05ad79859245665a21004b3efd9a8de4b3de
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, many of which point to a link farm hosted on cdn.shopify.com, designed to appear as legitimate book downloads. One critical heuristic firing indicates a direct link to a known malicious redirector at 'https://ttraff.ru/pify?keyword=data+structures+and+algorithms+best+book+pdf', suggesting the primary intent is to redirect users to malicious content. The document body, though heavily obfuscated, also contains this URL and other Shopify links, 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.ru/pify?keyword=data+structures+and+algorithms+best+book+pdf
    • http://files.kaleenacarter.com/uploads/1/3/2/3/132303061/mewapavapajeka-walukiwu.pdf
    • http://files.aimeeswenson.net/uploads/1/3/1/4/131438299/7298d224.pdf
    • http://files.cathyxwu.com/uploads/1/3/1/3/131383305/balogapugiligo.pdf
    • http://files.undertheirrelevance.com/uploads/1/3/0/8/130874120/94c144.pdf
    • http://xalona.manonsteyaertart.com/uploads/1/3/0/7/130738909/3d7f3856660.pdf
    • https://cdn.shopify.com/s/files/1/0437/9151/5808/files/polijok.pdf
    • https://cdn.shopify.com/s/files/1/0432/6601/5400/files/ecocardiografia_fetal.pdf
    • https://cdn.shopify.com/s/files/1/0431/5942/1092/files/15006409663.pdf
    • https://cdn.shopify.com/s/files/1/0433/9721/8471/files/the_assertiveness_workbook_free.pdf
    • https://cdn.shopify.com/s/files/1/0435/5611/0487/files/faxerixovojamepefexize.pdf
    • https://cdn.shopify.com/s/files/1/0429/4456/1318/files/tomb_raider_legend_walkthrough.pdf
    • https://cdn.shopify.com/s/files/1/0434/0655/7341/files/30055327768.pdf
    • https://cdn.shopify.com/s/files/1/0431/8242/4215/files/dragon_ball_legends_android_19.pdf
    • https://cdn.shopify.com/s/files/1/0429/1392/3228/files/leveredamijufogojezamese.pdf
    • https://cdn.shopify.com/s/files/1/0434/6055/9013/files/62210054832.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006f5f.bin
5a2a4a975b9a85584f928bc726d48ae623909802ec282870eb271dcbaf61caa9
pdf-font-stream PDF embedded font (sfnt) at offset 0x6F5F 5772 bytes
font_01_sfnt_off000082d0.bin
9e3906ea17518ed8f141ea7ddbbd26502a6d93f7afb33aa5d442ca8cf419ef21
pdf-font-stream PDF embedded font (sfnt) at offset 0x82D0 3216 bytes
font_02_sfnt_off00008f39.bin
8ad713e8d525b20f9ab9498d38f4541066666e12d055878595308d47a43a9a56
pdf-font-stream PDF embedded font (sfnt) at offset 0x8F39 10424 bytes
font_03_sfnt_off0000b30c.bin
8de9fc0338833fab89181190567c0337f91c2ea9dbdc17021a3d91c4ec0152c5
pdf-font-stream PDF embedded font (sfnt) at offset 0xB30C 17516 bytes