Malicious PDF — malware analysis report

Static analysis result for SHA-256 236df8a59160f323…

MALICIOUS

PDF

46.3 KB Created: 2020-09-04 08:11:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3eae660af03fc7ef1755b3702f446bcc SHA-1: 425c5777525a3d8cbfe11b0b21b93ef02039a42f SHA-256: 236df8a59160f323b36036356407863884dcedf7d2ca03a5428962de47cde7ae
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external resources, a technique often used for SEO poisoning or to redirect users to malicious sites. One critical heuristic identified a link to a known malicious redirector, ttraff.link, which is used here with a keyword suggesting a business document. The document body, though heavily obfuscated, contains the same URL and references to document templates, reinforcing the lure. No scripts were extracted, but the primary attack vector appears to be social engineering via a deceptive document.

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.link/pify?keyword=business+requirements+definition+document+template
    • https://cdn.shopify.com/s/files/1/0437/3217/2965/files/interpreting_slope_and_y-_intercept_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0460/1954/3199/files/baaghi_2_film_ringtone_free.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gowavofopinesifaremoka.pdf
    • https://cdn.shopify.com/s/files/1/0434/5813/4182/files/how_to_download_pokemon_glazed_nuzlocke.pdf
    • https://cdn.shopify.com/s/files/1/0430/2775/9257/files/logam_alkali_tanah.pdf
    • https://static.usrfiles.com/ugd/06497e_93b243f552d246f39f780295b277e75b.pdf
    • https://cdn.shopify.com/s/files/1/0432/3000/3358/files/wanemapuzekuvo.pdf
    • https://cdn.shopify.com/s/files/1/0434/1425/7820/files/wusasuririj.pdf
    • https://cdn.shopify.com/s/files/1/0436/9953/6040/files/fraction_decimal_percent_conversion_chart_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0428/4229/2390/files/10306274149.pdf
    • https://static.usrfiles.com/ugd/7a11b0_5d4c76e272844a948687bf9bcd863ec5.pdf
    • https://static.usrfiles.com/ugd/89441e_2e06a18e36204e0595b5822a7b1e5e60.pdf
    • https://static.usrfiles.com/ugd/10e3af_6d6e1bb29a2948459b074c4d4d08887d.pdf
    • https://static.usrfiles.com/ugd/30e015_0e165debe53a477094c0115208ebd6b2.pdf
    • https://static.usrfiles.com/ugd/704988_1d27ffac542d40d6b53e2d19f3eb6809.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_off000075fa.bin
28a8b496683a832f96a564cd4e62024e0579670c295a635d1b785b584e2f8e92
pdf-font-stream PDF embedded font (sfnt) at offset 0x75FA 5476 bytes
font_01_sfnt_off00008884.bin
f64590fe4855a45f5f4519b850419aa2247fce25c6ad3ddce81d299bce85fea2
pdf-font-stream PDF embedded font (sfnt) at offset 0x8884 10396 bytes