Malicious PDF — malware analysis report

Static analysis result for SHA-256 eede15be30ea6237…

MALICIOUS

PDF

45.6 KB Created: 2020-08-15 12:42:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 31ff9c88164294758b8564e54a0ce61c SHA-1: d69035f9993cb846aa36beccc1a2b25f7879ea3b SHA-256: eede15be30ea623723620c40a0dee4a3d5d705271abec37abba9537e0c7737a1
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a large number of embedded links, many pointing to what appears to be a link farm designed to distribute malicious content. The primary malicious URL identified is ttraff.ru, which is flagged as a known malicious redirector. The document body, though malformed, suggests a lure related to an academic worksheet, likely to trick users into clicking the malicious links. No scripts were extracted, but the PDF structure itself facilitates the attack.

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/pify?keyword=characteristics+of+life+lab+worksheet
    • http://files.elder-well.net/uploads/1/3/0/9/130969791/3751951.pdf
    • http://files.aresnutritionnj.com/uploads/1/3/0/7/130775334/xuziloto-lobux-fugopisowakidi.pdf
    • http://files.designphotographyusa.com/uploads/1/3/1/0/131071056/ginepe_lumetadolevo_pobapijujiraf.pdf
    • http://files.blainegonzalez.com/uploads/1/3/2/6/132696128/gozawejefin-dopenepaminibuf.pdf
    • http://mifoburej.markesanbiblechurch.org/uploads/1/3/0/9/130968921/2288967.pdf
    • https://cdn.shopify.com/s/files/1/0428/3976/9254/files/application_of_gis_in_forestry.pdf
    • https://cdn.shopify.com/s/files/1/0430/1760/1181/files/cbse_biology_project_on_cancer.pdf
    • https://cdn.shopify.com/s/files/1/0432/0506/6913/files/tugulegurapurimerirurumi.pdf
    • https://cdn.shopify.com/s/files/1/0435/6934/8763/files/argumento_ontologico.pdf
    • https://cdn.shopify.com/s/files/1/0431/1187/4716/files/88165480945.pdf
    • https://cdn.shopify.com/s/files/1/0434/8074/4089/files/numejajorejebo.pdf
    • https://cdn.shopify.com/s/files/1/0431/1659/3312/files/zesuxax.pdf
    • https://cdn.shopify.com/s/files/1/0429/9961/1553/files/astm_a53_pipe.pdf
    • https://cdn.shopify.com/s/files/1/0437/8171/8173/files/xelusadonukurugeburo.pdf
    • https://cdn.shopify.com/s/files/1/0428/0002/1667/files/vezirixuxek.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_off000066fc.bin
21edfc9ec2e66832998707c44ea208c47163ce26459a738ff78603c30a22dea8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66FC 4968 bytes
font_01_sfnt_off0000780a.bin
8529719a93e88cf78ce10d0159ecdf08ccafdfb2f60ffc86da442652ff0b1922		 pdf-font-stream PDF embedded font (sfnt) at offset 0x780A 10296 bytes
font_02_sfnt_off00009b1a.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9B1A 4324 bytes

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