Malicious PDF — malware analysis report

Static analysis result for SHA-256 38e6f9cb2062bcdc…

MALICIOUS

PDF

42.9 KB Created: 2020-08-24 04:22:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5765d2442f223f2b5dea65479412c1eb SHA-1: f69c61bdb0864cd216efa6a370067d8f980e0459 SHA-256: 38e6f9cb2062bcdc71a82f3df4cd59e549d57aa091bee0db96e1042fd22ef580
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.com/pify?keyword=twitter+gif+and+video+er'. This indicates the document's primary purpose is to redirect the user to malicious infrastructure. The document body, though heavily obfuscated, contains references to the redirector URL and other embedded URLs, reinforcing the malicious intent. The presence of a large number of external PDF links also suggests a link farm or SEO poisoning tactic to distribute the malicious content.

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=twitter+gif+and+video+er
    • http://pebule.championcleaning.net/uploads/1/3/1/3/131382134/8272b4cb409.pdf
    • http://files.gleimlightmedia.com/uploads/1/3/1/0/131070062/c404fbc1328e.pdf
    • http://files.laviishluxxe.com/uploads/1/3/0/7/130775942/1a41a3f.pdf
    • http://lufimuwu.cwquakertown.com/uploads/1/3/2/6/132696030/c682258ac3ad.pdf
    • http://sugajoman.madhavagarwal.net/uploads/1/3/0/7/130775045/9705434.pdf
    • https://cdn.shopify.com/s/files/1/0427/9150/1990/files/68416099459.pdf
    • https://cdn.shopify.com/s/files/1/0432/3033/1039/files/tecnologia_na_agricultura.pdf
    • https://cdn.shopify.com/s/files/1/0435/1610/0776/files/66895783075.pdf
    • https://cdn.shopify.com/s/files/1/0431/5463/6966/files/vitinutigozevedixerafiw.pdf
    • https://cdn.shopify.com/s/files/1/0427/7259/4844/files/luminokisite.pdf
    • https://cdn.shopify.com/s/files/1/0430/7773/0464/files/weturot.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/pexivopagutufaxusezonav.pdf
    • https://cdn.shopify.com/s/files/1/0435/6620/3029/files/labogaberizusolipuki.pdf
    • https://cdn.shopify.com/s/files/1/0436/1093/1358/files/91389705383.pdf
    • https://cdn.shopify.com/s/files/1/0429/9633/4753/files/discipline_and_grievances_at_work_acas_guide.pdf
    • https://cdn.shopify.com/s/files/1/0430/9575/2858/files/zunatinawununidit.pdf
    • https://cdn.shopify.com/s/files/1/0431/8117/9029/files/zodekutufolu.pdf
    • https://cdn.shopify.com/s/files/1/0430/7940/1634/files/sogoxejamepakujir.pdf
    • https://twitter.com/CGTNOfficial/stat
    • 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_off00006b17.bin
ec3041d54b640703dba054bf95e321a446668c49279abffedfa9fae2857b01b9
pdf-font-stream PDF embedded font (sfnt) at offset 0x6B17 4964 bytes
font_01_sfnt_off00007c21.bin
ec3b925c36a0b672dd6fb706637e12bf0905b3429bb41788334ad13287e326a4
pdf-font-stream PDF embedded font (sfnt) at offset 0x7C21 10328 bytes