Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0db9cc8da5e3b9d…

MALICIOUS

PDF

62.8 KB Created: 2020-07-22 23:14:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e6cf8f642f43ff4ff6c9d12c93f93bd5 SHA-1: 5863b7816fce431ea2fa27cd11e4af973191c413 SHA-256: b0db9cc8da5e3b9dac889164945e01d341f801d925163361174ec6c9cbc4c4e5
154 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with a critical heuristic firing for a malicious redirector. The document body, though heavily obfuscated, suggests a lure related to 'gripper design robotic arm pdf'. The primary malicious URL identified is ttraff.ru, which is likely used to redirect users to further malicious content or phishing pages. The PDF also hosts a large number of external links, indicating a link farm for SEO manipulation or broader distribution.

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.ru/wb?keyword=gripper%20design%20robotic%20arm%20pdf
    • http://files.fairfaxgammaphibeta.org/uploads/1/3/0/7/130739713/vazuganete.pdf
    • http://files.christianchildrensentertainment.com/uploads/1/3/0/7/130740458/992bf10a.pdf
    • http://files.redbirdbands.com/uploads/1/3/1/4/131406732/c8dbcda88119982.pdf
    • http://files.cabinmill.com/uploads/1/3/1/4/131482975/lijim_jubizufo_latogelosoza_lawas.pdf
    • http://files.christianchildrensentertainment.com/
    • https://cdn.shopify.com/s/files/1/0432/7673/0533/files/22112299311.pdf
    • https://cdn.shopify.com/s/files/1/0430/6301/7629/files/pekiwubipinewukitixojobu.pdf
    • https://cdn.shopify.com/s/files/1/0434/0688/5027/files/43915471572.pdf
    • https://didebonuruta.files.wordpress.com/2020/06/4539986472.pdf
    • https://pofiwofuleb.files.wordpress.com/2020/07/votabu.pdf
    • https://bazolexadole.files.wordpress.com/2020/06/direwo.pdf
    • https://popixunumofi.files.wordpress.com/2020/06/lirewafe.pdf
    • https://cdn.shopify.com/s/files/1/0430/6681/8721/files/13840096941.pdf
    • https://cdn.shopify.com/s/files/1/0431/5735/6710/files/sekugilofoziv.pdf
    • https://cdn.shopify.com/s/files/1/0430/7494/5184/files/28912437611.pdf
    • https://cdn.shopify.com/s/files/1/0437/8555/2030/files/sufujigazifavunijo.pdf
    • https://cdn.shopify.com/s/files/1/0433/9970/8821/files/1434402763.pdf
    • https://cdn.shopify.com/s/files/1/0433/3328/8088/files/zowasawonaze.pdf
    • https://cdn.shopify.com/s/files/1/0430/0832/7829/files/toruxor.pdf
    • https://cdn.shopify.com/s/files/1/0434/5695/4518/files/13484137510.pdf
    • https://cdn.shopify.com/s/files/1/0431/1570/8580/files/27410655356.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_off0000b192.bin
6bc6452e73fcc6420db6c98054a08ca90748f3013b00e3bef0970bd457746aca		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB192 5404 bytes
font_01_sfnt_off0000c3d8.bin
44c7d5359487c8ff3fd1f12e373ec00e5a3d3ce7715ee61635965d267f647305		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC3D8 13124 bytes

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