Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4f5e53e1d81dcdb…

MALICIOUS

PDF

44.2 KB Created: 2020-08-07 20:02:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 04e9a9115ed0ce1b4215c49b5729416c SHA-1: a30c9d92efabc3095d7eeed128dcb3569152c94a SHA-256: f4f5e53e1d81dcdb1520f8ceec5c27b149ab3325cf37f4abd355071ba94b1b4c
150 Risk Score

Malware Insights

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

The PDF document was flagged by multiple critical heuristics for containing malicious redirector links and a large number of external PDF links, suggesting a link farm. One of the embedded URLs, https://ttraff.com/pify?keyword=archinterior+39+pdf, is identified as a known malicious redirector. The document body, though heavily obfuscated, contains this URL and other Shopify-hosted PDF links. The primary intent appears to be directing users to malicious infrastructure through a deceptive link farm.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.com/pify?keyword=archinterior+39+pdf
    • http://files.countrysideimplements.com/uploads/1/3/0/7/130738823/fifiraxutu_bipixuz_gazef.pdf
    • http://files.napafermentation.com/uploads/1/3/1/4/131408798/lodujomewetex_xinawojogufe_zirif.pdf
    • http://files.puetzerlab.com/uploads/1/3/1/3/131380915/4285263.pdf
    • http://tutafo.carentandvacancy.com/uploads/1/3/1/4/131453645/xexitilenuruduloviz.pdf
    • https://cdn.shopify.com/s/files/1/0436/5529/9237/files/tunogerobixim.pdf
    • https://cdn.shopify.com/s/files/1/0437/4131/5223/files/93088482264.pdf
    • https://cdn.shopify.com/s/files/1/0432/3740/8936/files/suvaxadelipuf.pdf
    • https://cdn.shopify.com/s/files/1/0428/9894/8255/files/72794364875.pdf
    • https://cdn.shopify.com/s/files/1/0431/7495/3120/files/78157278765.pdf
    • https://cdn.shopify.com/s/files/1/0433/3505/7559/files/vickers_hydrolic_pump.pdf
    • https://cdn.shopify.com/s/files/1/0431/1387/3569/files/biwidasatobepefitopobu.pdf
    • https://cdn.shopify.com/s/files/1/0429/8525/9159/files/alexa_bula.pdf
    • https://cdn.shopify.com/s/files/1/0433/7798/3651/files/65275347333.pdf
    • https://cdn.shopify.com/s/files/1/0433/3407/4523/files/rubugemezojanivudijebo.pdf
    • https://cdn.shopify.com/s/files/1/0433/5743/8101/files/happy_birthday_piano_sheet_easy.pdf
    • https://cdn.shopify.com/s/files/1/0429/3551/7337/files/81227061568.pdf
    • https://cdn.shopify.com/s/files/1/0434/2710/2887/files/79797482689.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_off00005086.bin
52a8c8a3e3d141477b2348f6a1c555ed9d29e74982e5661393e3e06cb7c62ca6
pdf-font-stream PDF embedded font (sfnt) at offset 0x5086 5132 bytes
font_01_sfnt_off000061fe.bin
9e8eae21d29f6f1f2c08691f17d257d93e60a026cc3eaf7e96e5dca856e6caf5
pdf-font-stream PDF embedded font (sfnt) at offset 0x61FE 16076 bytes
font_02_sfnt_off00008d22.bin
bc6d684f813ac1c32be8bd0fe15b7813cdddcd900b6f98dcbbe4bb93017ec79b
pdf-font-stream PDF embedded font (sfnt) at offset 0x8D22 16448 bytes