Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ba3f5708cc96bf5…

MALICIOUS

PDF

32.6 KB Created: 2020-08-17 04:07:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3396a0cacca748d6634745e090495699 SHA-1: 86973afce83fded13e72402743c07ae3f87fd9ca SHA-256: 4ba3f5708cc96bf5edcc5e1d4a95097b873678ad22fced86dd648ea143e76ffa
152 Risk Score

Malware Insights

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

The PDF contains a deceptive document body and numerous embedded URLs, including a critical redirector link to 'ttraff.cc'. This indicates a phishing attempt to lure users to malicious infrastructure. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted from this sample.

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.cc/pify?keyword=buffalo+platform+shoes+for+sale
    • http://files.byyoursidecounselling.co.uk/uploads/1/3/0/7/130738801/505747c08fae3.pdf
    • http://files.karenwoodmansee.com/uploads/1/3/1/4/131483069/805631.pdf
    • https://cdn.shopify.com/s/files/1/0430/5109/0077/files/15880577142.pdf
    • https://cdn.shopify.com/s/files/1/0430/9454/0452/files/77458913329.pdf
    • https://cdn.shopify.com/s/files/1/0430/1275/1523/files/fikabipovojixikodesepebum.pdf
    • https://cdn.shopify.com/s/files/1/0439/2042/5115/files/39434721976.pdf
    • https://cdn.shopify.com/s/files/1/0428/1470/1735/files/77879581765.pdf
    • https://cdn.shopify.com/s/files/1/0432/3596/7143/files/acknowledgement_for_vocational_training_report.pdf
    • https://cdn.shopify.com/s/files/1/0435/1868/9432/files/iris_dataset_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/8127/7342/files/70628813013.pdf
    • https://cdn.shopify.com/s/files/1/0437/9007/4005/files/maksud_pluralisme.pdf
    • https://cdn.shopify.com/s/files/1/0448/4576/0669/files/78352808681.pdf
    • https://cdn.shopify.com/s/files/1/0427/9051/8940/files/vopuboropimep.pdf
    • https://cdn.shopify.com/s/files/1/0431/5666/8573/files/72670043523.pdf
    • https://cdn.shopify.com/s/files/1/0431/2684/9700/files/70725150851.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004599.bin
7ec56f41220496f1b8c99325e0eeaaff591a7ae430049bcfe6a5eb80ffd26594
pdf-font-stream PDF embedded font (sfnt) at offset 0x4599 5192 bytes
font_01_sfnt_off0000571a.bin
a96b6551ac240040f5a33abb7acee8a0524160fb421a65a00cd547251412c79f
pdf-font-stream PDF embedded font (sfnt) at offset 0x571A 9004 bytes