Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1b17c9abb31bbba…

MALICIOUS

PDF

59.9 KB Created: 2020-08-13 15:35:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8ca56d364ceee8357468bb24a52fe1db SHA-1: 95901583d8c8b5fbcd7ea07e2bc1ec2adfddcc48 SHA-256: f1b17c9abb31bbbacc477dfea16dc0c30e8a91cd8f8de4e235b5514271ab5db0
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to Shopify domains hosting other PDFs, but one critical link redirects to a known malicious domain, ttraff.ru. This indicates a link farm or SEO poisoning tactic designed to lure users to malicious infrastructure. The document body, though heavily obfuscated, contains the same malicious URL, reinforcing the intent to redirect users. No scripts were extracted from this sample.

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=halimbawa+ng+akademikong+sulatin+pdf
    • http://gejapa.pluckersworld.com/uploads/1/3/1/3/131379803/2bc060722b1bd.pdf
    • http://bifogunu.pointmountaincarpentry.com/uploads/1/3/2/6/132682076/xumolado-niven-dagumo.pdf
    • http://files.dragonflypediatricot.com/uploads/1/3/1/3/131381799/xipetezepaz.pdf
    • http://vopibovep.blaisebaptist.org/uploads/1/3/0/7/130740496/4731905.pdf
    • http://files.pelfranchise.com/uploads/1/3/1/3/131384306/2608492.pdf
    • https://www.google.com.ph/search?biw=1366&bih=662&tbm=isch&sa=1&ei=UAJvW5HRGt
    • https://www.google.com.ph/search?biw=1366&bih=662&tbm=isch&sa=1&ei=UAJvW5HRGt
    • https://cdn.shopify.com/s/files/1/0433/5307/9963/files/33161710508.pdf
    • https://cdn.shopify.com/s/files/1/0437/9141/7505/files/wiwarisulutidakopap.pdf
    • https://cdn.shopify.com/s/files/1/0445/3846/2372/files/git_force_overwrite.pdf
    • https://cdn.shopify.com/s/files/1/0429/9164/8929/files/6275954121.pdf
    • https://cdn.shopify.com/s/files/1/0438/2123/6384/files/99679700911.pdf
    • https://cdn.shopify.com/s/files/1/0427/3229/0215/files/the_year_of_the_cat_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0435/8553/6159/files/vofitedopiwibawofik.pdf
    • https://cdn.shopify.com/s/files/1/0439/9448/0798/files/temoxalefut.pdf
    • https://cdn.shopify.com/s/files/1/0438/7520/5288/files/lexevekewotatop.pdf
    • https://cdn.shopify.com/s/files/1/0427/6423/9014/files/puwepetejok.pdf
    • https://cdn.shopify.com/s/files/1/0436/7951/4777/files/army_height_and_weight_calculator.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_off00009b53.bin
f11550f41a13d56c3c865e02ff67cde25093618a6d85d3e44d88cbca30f2a4a9
pdf-font-stream PDF embedded font (sfnt) at offset 0x9B53 5404 bytes
font_01_sfnt_off0000adb0.bin
d279c531650130898f4dbf2ba6432f6930ab6806bb331185e279c7153de3e938
pdf-font-stream PDF embedded font (sfnt) at offset 0xADB0 11240 bytes
font_02_sfnt_off0000d3e1.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378
pdf-font-stream PDF embedded font (sfnt) at offset 0xD3E1 4324 bytes