Malicious PDF — malware analysis report

Static analysis result for SHA-256 c579e091c6ca129e…

MALICIOUS

PDF

42.9 KB Created: 2020-08-25 22:28:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 267d673060cd2cfa46dc4c1f166d9a8c SHA-1: 752b6a4209cd284ec0640238eba3f53e4edc1a65 SHA-256: c579e091c6ca129ed4e8b2d85d8681018ff63c7d37bd1ff13b3562badeb9758d
154 Risk Score

Malware Insights

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

The PDF contains a link to a redirector URL, which is a common technique for delivering malware or phishing pages. The document body, though heavily obfuscated, contains text related to 'Gigabyte sata2 driver' and includes the malicious URL, suggesting a lure to trick users into downloading a fake driver. The presence of a PDF link farm further indicates malicious intent, likely for SEO poisoning or distributing malicious content. 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=gigabyte+sata2+driver
    • http://files.potomacfallsdrama.org/uploads/1/3/0/7/130775719/1088589.pdf
    • https://cdn.shopify.com/s/files/1/0431/7960/6177/files/53118733696.pdf
    • https://cdn.shopify.com/s/files/1/0434/2621/8134/files/mikajilog.pdf
    • https://cdn.shopify.com/s/files/1/0436/9291/6891/files/98374618451.pdf
    • https://cdn.shopify.com/s/files/1/0435/2226/1143/files/38726372836.pdf
    • https://cdn.shopify.com/s/files/1/0435/8776/4387/files/bekavikenej.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/8917749958.pdf
    • https://cdn.shopify.com/s/files/1/0437/1139/8042/files/famobaponeb.pdf
    • https://cdn.shopify.com/s/files/1/0432/5117/1478/files/40721003718.pdf
    • https://cdn.shopify.com/s/files/1/0433/8860/0478/files/weluvewidefoxonuxebofir.pdf
    • https://cdn.shopify.com/s/files/1/0437/5399/6442/files/case_files_family_medicine_5th_edition.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_off0000690f.bin
24ff2ec3e5ff752dd5938644b4ef7cb432ab20142263a2962d9dac39b8348cdf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x690F 5424 bytes
font_01_sfnt_off00007ba6.bin
6072a7c260880f0ef4257f23bbc28f2ee069e4536860ae8b6f3570e972044387		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7BA6 10364 bytes

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