Malicious PDF — malware analysis report

Static analysis result for SHA-256 f597af72b5c8d6f1…

MALICIOUS

PDF

58.2 KB Created: 2020-08-12 06:48:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: be9d762a15af545b0ad6dfd819e82315 SHA-1: 39bc18bd6678533dd750853b853abbdb88b962d3 SHA-256: f597af72b5c8d6f120fdf93f74ef37f88636038dbfa3e24849848e41a790d348
150 Risk Score

Malware Insights

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

The PDF contains numerous links, with a critical heuristic identifying a malicious redirector. The primary malicious URL, https://ttraff.com/pify?keyword=williams+hematology+6th+edition+pdf, is designed to redirect users to potentially harmful content. The document body, though heavily obfuscated, contains this URL, reinforcing its role as a lure. The presence of a large number of external PDF links suggests a link farm or SEO poisoning tactic to increase visibility and traffic to malicious sites.

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=williams+hematology+6th+edition+pdf
    • http://files.hirneisenhighflyers.com/uploads/1/3/1/1/131164153/muwobetokezuf.pdf
    • http://files.carlfismer.com/uploads/1/3/1/1/131164236/9192788.pdf
    • http://files.beitnachum.org/uploads/1/3/1/4/131483253/ximegigojepirez_rabisosip_suwupisi.pdf
    • http://rikewoxot.sheldonbryant.com/uploads/1/3/1/3/131379179/bixegimud.pdf
    • http://files.parkerpond.org/uploads/1/3/0/8/130874490/6096010.pdf
    • https://cdn.shopify.com/s/files/1/0428/5064/8223/files/rewowa.pdf
    • https://cdn.shopify.com/s/files/1/0438/4528/8093/files/islanders_schedule.pdf
    • https://cdn.shopify.com/s/files/1/0431/1184/1958/files/sample_job_application_letter_for_accountant.pdf
    • https://cdn.shopify.com/s/files/1/0431/7180/7391/files/6239088601.pdf
    • https://cdn.shopify.com/s/files/1/0435/3264/8602/files/bordereaux_de_livraison.pdf
    • https://cdn.shopify.com/s/files/1/0435/1583/8618/files/59366041809.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kewosa.pdf
    • https://cdn.shopify.com/s/files/1/0432/0778/6654/files/49604452803.pdf
    • https://cdn.shopify.com/s/files/1/0433/4305/2953/files/93401574726.pdf
    • https://cdn.shopify.com/s/files/1/0440/5549/4806/files/83109765714.pdf
    • https://cdn.shopify.com/s/files/1/0427/6623/7852/files/kixebunem.pdf
    • https://cdn.shopify.com/s/files/1/0431/2468/7014/files/tiff_file_to.pdf
    • https://cdn.shopify.com/s/files/1/0431/6053/5196/files/97108884403.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_off00009738.bin
36730d5651a4e9c53afc257f4d6d4e0a0c8d207738d008327c41580703087b54
pdf-font-stream PDF embedded font (sfnt) at offset 0x9738 5416 bytes
font_01_sfnt_off0000a995.bin
14ca1e60379a2be016bf76abe5ef48b7e4d8bff98c9c629e96a127a4b2a5a72b
pdf-font-stream PDF embedded font (sfnt) at offset 0xA995 10340 bytes
font_02_sfnt_off0000ccf6.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361
pdf-font-stream PDF embedded font (sfnt) at offset 0xCCF6 4324 bytes