Malicious PDF — malware analysis report

Static analysis result for SHA-256 81106850333cdc6f…

MALICIOUS

PDF

45.5 KB Created: 2020-08-22 16:49:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aa2bd55f79c3abba2d88b1a0af0cbdeb SHA-1: bd3fb68d8f77d46a952899ad744c08a15fd4b3bc SHA-256: 81106850333cdc6f3ae32a619cd31590c652855ebbcf5ecbdd09a69242f6cb10
128 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 User Execution: Malicious Link

The PDF file contains numerous embedded links, a tactic often used to redirect users to malicious websites. Specifically, one link points to a known malicious redirector infrastructure, ttraff.com, which is further disguised with a keyword related to job applications. The presence of a 'download button' heuristic and the document body content suggesting a CV template further support the lure-based attack pattern. The file also exhibits characteristics of a link farm, with many links pointing to Shopify-hosted PDFs, likely for SEO manipulation to increase visibility.

Heuristics 4

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=accounting+manager+cv+template+word
    • http://files.sidewalkservantsphilly.com/uploads/1/3/0/9/130969588/309068e.pdf
    • http://bibilola.hcleathergoods.com/uploads/1/3/2/8/132814930/winosaxirukazu.pdf
    • http://files.lzventures.com.au/uploads/1/3/1/0/131070866/4e280df.pdf
    • http://savomuv.ezbustours.travel/uploads/1/3/1/4/131438282/d8ac9562ee8.pdf
    • https://cdn.shopify.com/s/files/1/0429/7061/1871/files/weretapegoku.pdf
    • https://cdn.shopify.com/s/files/1/0437/7047/8746/files/92573802017.pdf
    • https://cdn.shopify.com/s/files/1/0429/0838/5439/files/47172145607.pdf
    • https://cdn.shopify.com/s/files/1/0432/3108/4708/files/veraxonabalarejetabobaj.pdf
    • https://cdn.shopify.com/s/files/1/0429/3738/5123/files/89979903784.pdf
    • https://cdn.shopify.com/s/files/1/0430/9296/7581/files/practical_kabbalah_magic.pdf
    • https://cdn.shopify.com/s/files/1/0431/8022/8768/files/tesisivoz.pdf
    • https://cdn.shopify.com/s/files/1/0433/0340/3678/files/91033343307.pdf
    • https://cdn.shopify.com/s/files/1/0427/7701/8524/files/52903918863.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_off000067e3.bin
b7f317aa0f29cd34df008dc84d8f376d2685882a57a4a5cd0d86477d0adf885a
pdf-font-stream PDF embedded font (sfnt) at offset 0x67E3 2828 bytes
font_01_sfnt_off000071de.bin
42f5793708b773b0b8d12b4b636c58febec2bddcfee5666ec9da914f36e66629
pdf-font-stream PDF embedded font (sfnt) at offset 0x71DE 5356 bytes
font_02_sfnt_off00008406.bin
f0107f55b174b1424071c05842a1370c45e5b20e9a9010a73c6e23ea54a4b46e
pdf-font-stream PDF embedded font (sfnt) at offset 0x8406 10400 bytes