Malicious PDF — malware analysis report

Static analysis result for SHA-256 59d75e6e2f3cdac1…

MALICIOUS

PDF

40.3 KB Created: 2020-08-20 22:33:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 362fc5ebe7d7707abe9073f183346c89 SHA-1: 34ffbb28fc0c7b7dd2666832994c1cbf5aa82525 SHA-256: 59d75e6e2f3cdac1ff5beba99c61c98dc7c39a09347a41873b7842cbb2914733
152 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it exhibits a PDF link farm, suggesting an attempt to distribute malicious content or SEO manipulation. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of embedded URLs and the redirector link indicate a phishing or redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=geladeira+brastemp+clean+manual
    • http://kekimo.connectabletherapies.com/uploads/1/3/0/7/130776054/tikajo_wivadirofarase.pdf
    • http://zifot.porterrc.com/uploads/1/3/0/9/130969352/7817140.pdf
    • https://cdn.shopify.com/s/files/1/0432/5398/9534/files/milwaukee_brewers_schedule_2018.pdf
    • https://cdn.shopify.com/s/files/1/0447/5338/7674/files/zuruseji.pdf
    • https://cdn.shopify.com/s/files/1/0438/2208/8354/files/89972797438.pdf
    • https://cdn.shopify.com/s/files/1/0434/5459/5225/files/18604205224.pdf
    • https://cdn.shopify.com/s/files/1/0434/6304/9376/files/tuxodivanak.pdf
    • https://cdn.shopify.com/s/files/1/0432/1394/7041/files/punurajujepoxorug.pdf
    • https://cdn.shopify.com/s/files/1/0433/2647/2345/files/nirokikamivukevewasad.pdf
    • https://cdn.shopify.com/s/files/1/0431/8766/7103/files/demefokumapotupesuti.pdf
    • https://cdn.shopify.com/s/files/1/0435/1157/8776/files/arduino_mega_2560_pin_mapping_pdf.pdf
    • https://cdn.shopify.com/s/files/1/0431/8828/9694/files/molut.pdf
    • https://cdn.shopify.com/s/files/1/0428/9495/0559/files/42940632407.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_off00005215.bin
db172c11bbac8a4973fb081b4ea9e8862e95178d898644a5b3138ae089cd94b9
pdf-font-stream PDF embedded font (sfnt) at offset 0x5215 5160 bytes
font_01_sfnt_off00006382.bin
bca5be4e680a2d3fcfc7579fea16e4d1ec92e94b9b8717481e7363ba02ceaa95
pdf-font-stream PDF embedded font (sfnt) at offset 0x6382 10380 bytes
font_02_sfnt_off00008686.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230
pdf-font-stream PDF embedded font (sfnt) at offset 0x8686 4324 bytes