Malicious PDF — malware analysis report

Static analysis result for SHA-256 51350905ceca9646…

MALICIOUS

PDF

56.1 KB Created: 2020-08-19 07:52:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c869fd89410801257894fc4bc9e6847d SHA-1: df3b6a924367be92f996be253d479dfd5e3e2889 SHA-256: 51350905ceca96467a92efee95070af54bbb6b7c0d83449c13352f74256615df
152 Risk Score

Malware Insights

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

The PDF contains numerous links, including one pointing to a known malicious redirector at 'ttraff.cc'. The document body, though heavily obfuscated, also contains this URL, suggesting a lure to trick users into clicking malicious links. The presence of a link farm and a malicious redirector indicates an attempt to lead users to harmful content, likely for credential harvesting or malware delivery.

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=github+repo+card+template
    • http://files.gratefulgathers.com/uploads/1/3/1/4/131406885/08d331ab2f.pdf
    • http://vovika.aquitaliayachtsusa.com/uploads/1/3/0/8/130814328/8e42c.pdf
    • http://files.halfbakedrant.com/uploads/1/3/1/8/131871569/zolizunuwi-pamexoniperu-gijufiwumeso.pdf
    • http://files.katelyncostello.com/uploads/1/3/1/6/131637723/geramavelo.pdf
    • http://files.heike-anna.nl/uploads/1/3/1/8/131856743/zaxexidogizedovev.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/gekubamunanapomokavonata.pdf
    • https://cdn.shopify.com/s/files/1/0428/3593/5388/files/kodavaja.pdf
    • https://cdn.shopify.com/s/files/1/0436/5628/2265/files/american_museum_of_natural_history_map.pdf
    • https://cdn.shopify.com/s/files/1/0433/0304/3230/files/89860373344.pdf
    • https://cdn.shopify.com/s/files/1/0434/1674/8188/files/jamibomunevafapib.pdf
    • https://cdn.shopify.com/s/files/1/0432/9252/4702/files/fasimugof.pdf
    • https://cdn.shopify.com/s/files/1/0429/0789/3919/files/nujadenudaxumilaw.pdf
    • https://cdn.shopify.com/s/files/1/0434/3942/3655/files/wugepazexak.pdf
    • https://cdn.shopify.com/s/files/1/0430/5318/7221/files/gopobewi.pdf
    • https://cdn.shopify.com/s/files/1/0434/5980/5350/files/60206838518.pdf
    • https://cdn.shopify.com/s/files/1/0429/3178/1791/files/ashokan_farewell_tab.pdf
    • https://cdn.shopify.com/s/files/1/0434/9083/6632/files/86222468351.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006e92.bin
dab387861e2dcce7b65ee94a6103418cc4bf339b7a295334f16b7a9efe330f8f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E92 5080 bytes
font_01_sfnt_off00007fce.bin
d8fcad6fcc101ba80e41089d7bf4f7190322af2b426db7b5409e3cb0bf54a4bc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7FCE 15036 bytes
font_02_sfnt_off0000af4a.bin
8209c5fc27800dad91b79bdc1d2542939faa66d1b2f519a8f9f1b913071849a2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAF4A 16296 bytes
font_03_sfnt_off0000c4c5.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC4C5 4324 bytes

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