Malicious PDF — malware analysis report

Static analysis result for SHA-256 735226a5d9e7cc6c…

MALICIOUS

PDF

52.0 KB Created: 2020-08-01 14:58:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cbdbf5adfcc64823e02d5ad4caea6069 SHA-1: fcd74cbc8d0a3d80bf17d404ba5330a1e1e7e8d4 SHA-256: 735226a5d9e7cc6cad3d473ae6f6413bf5092035cc33a1e0a78a3309763dde1f
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to a known malicious redirector, ttraff.com, which is designed to lure users to potentially harmful content. The PDF also hosts a large number of external links, many pointing to Shopify, suggesting an attempt to manipulate search engine results or distribute content through a compromised platform. The ML classifier strongly indicated maliciousness.

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.com/pify?keyword=pdf+to+dxf+converter+online
    • http://files.dynastyenergyservices.net/uploads/1/3/2/7/132740378/c1b115f482.pdf
    • http://files.belizelionfish.org/uploads/1/3/2/3/132302802/7889735.pdf
    • http://files.butternutbrookequinecenter.com/uploads/1/3/1/6/131606291/2540467.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0427/6345/2583/files/kokufalerilapizafurepekib.pdf
    • https://cdn.shopify.com/s/files/1/0432/5244/9435/files/65333323068.pdf
    • https://cdn.shopify.com/s/files/1/0440/6440/7702/files/japipeselorajavax.pdf
    • https://cdn.shopify.com/s/files/1/0439/3051/7672/files/gesisozobaraxebiniluda.pdf
    • https://cdn.shopify.com/s/files/1/0429/1556/1638/files/12592758769.pdf
    • https://cdn.shopify.com/s/files/1/0428/1961/6935/files/19517061537.pdf
    • https://cdn.shopify.com/s/files/1/0433/3171/5225/files/daliripogima.pdf
    • https://cdn.shopify.com/s/files/1/0431/4244/7265/files/46491568157.pdf
    • https://cdn.shopify.com/s/files/1/0428/3170/8316/files/17414994212.pdf
    • https://cdn.shopify.com/s/files/1/0438/0108/4064/files/nuweresidunesimal.pdf
    • https://cdn.shopify.com/s/files/1/0432/5205/6227/files/53339296448.pdf
    • https://cdn.shopify.com/s/files/1/0428/2135/3635/files/tafejo.pdf
    • https://cdn.shopify.com/s/files/1/0432/6211/6008/files/88355677447.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000818e.bin
2615b7eb146b516c8bd458adb4e6c5e872cc9f5c2f0222088a592387ed281293		 pdf-font-stream PDF embedded font (sfnt) at offset 0x818E 4544 bytes
font_01_sfnt_off00009108.bin
bf4723bd1988226b193a90eeae480aa56a364d0871c7b0b580fa967fba4790cd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9108 10532 bytes
font_02_sfnt_off0000b4c2.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB4C2 4324 bytes

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