Malicious PDF — malware analysis report

Static analysis result for SHA-256 1267e29ce53967cd…

MALICIOUS

PDF

42.3 KB Created: 2020-08-07 09:35:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b3652b520ebda65f06a8465fa4fea24a SHA-1: cda71ece1edb47468b22e01bd32a6f2f6b54301b SHA-256: 1267e29ce53967cd747fbeaa21676908b630651cbdfd87e6c320f4569e5d8a66
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links, including one to a known malicious redirector at 'https://ttraff.ru/pify?keyword=biopsychosocial+theory+pdf'. The document body, though heavily obfuscated, also contains this URL and other links to what appear to be SEO-optimized PDF files hosted on Shopify. This suggests a link farm or phishing campaign designed to drive traffic to malicious infrastructure. No scripts were extracted, but the presence of malicious links is sufficient evidence of malicious intent.

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=biopsychosocial+theory+pdf
    • http://files.stmarksdurango.com/uploads/1/3/0/7/130740249/ruzuwagefawi-fumadup.pdf
    • http://files.joedonovanboxing.org/uploads/1/3/2/8/132815123/vaduzorakatuwibeluk.pdf
    • http://files.jberaeroclub.com/uploads/1/3/1/4/131437806/gisifezin.pdf
    • http://veleludol.flashforge.com.hk/uploads/1/3/1/3/131381464/163669.pdf
    • http://penebepam.kidsdollarstuff.com/uploads/1/3/0/8/130813765/jilasali-baminog-wazuzesotedat-wijelelowuj.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/6268/8918/files/54166663957.pdf
    • https://cdn.shopify.com/s/files/1/0437/1218/4474/files/fudafudineke.pdf
    • https://cdn.shopify.com/s/files/1/0434/3696/6055/files/tapotaxajijovi.pdf
    • https://cdn.shopify.com/s/files/1/0429/3053/6614/files/algebra_1_larson.pdf
    • https://cdn.shopify.com/s/files/1/0434/5656/1318/files/16223415469.pdf
    • https://cdn.shopify.com/s/files/1/0428/1496/3868/files/735009183.pdf
    • https://cdn.shopify.com/s/files/1/0435/4804/9572/files/mail_cumc_columbia_edu_owa.pdf
    • https://cdn.shopify.com/s/files/1/0431/1898/5370/files/97314531835.pdf
    • https://cdn.shopify.com/s/files/1/0431/4041/5644/files/3854600554.pdf
    • https://cdn.shopify.com/s/files/1/0429/8063/8879/files/empirical_research_methodology.pdf
    • https://cdn.shopify.com/s/files/1/0429/6799/0438/files/cardio_kickboxing_workout.pdf
    • https://cdn.shopify.com/s/files/1/0431/8960/0414/files/2186818502.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006800.bin
2daca9fabd2a54946aacf763fde83c916b46e38eb5a1be0b93d1d7566693cc6e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6800 5396 bytes
font_01_sfnt_off00007a62.bin
7398096a6f4aa812aad4ed94562d175d6aa4dc6b16e67dcc94048f6017a281c3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A62 9928 bytes

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