Malicious PDF — malware analysis report

Static analysis result for SHA-256 466eb3a3e585426b…

MALICIOUS

PDF

60.4 KB Created: 2020-07-31 14:45:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 091e2a132ab596396d67d7b2c2a74a21 SHA-1: 4d90cc3612bfa1ca7bbd4c71eb74c904902ef030 SHA-256: 466eb3a3e585426b79a76eb5059f544322b4ba864c0887bcf863252cb64a22ab
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it exhibits a PDF link farm heuristic, suggesting an attempt to manipulate search engine results or distribute content. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, a tool sometimes used to create malicious PDFs.

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=datacion+carbono+14+pdf
    • http://files.cantornote.com/uploads/1/3/1/4/131453592/suzisetokiviredaw.pdf
    • http://files.millersaddlesandsilver.com/uploads/1/3/0/7/130740196/pazumediwinavolod.pdf
    • http://files.ocsoilny.org/uploads/1/3/1/1/131164431/8873986.pdf
    • http://files.marlonkellyloans.com/uploads/1/3/2/7/132740595/ditefugepubetaseju.pdf
    • http://files.artinspirationbyrose.com/uploads/1/3/1/0/131070618/606515.pdf
    • https://cdn.shopify.com/s/files/1/0440/5025/1941/files/94415969138.pdf
    • https://cdn.shopify.com/s/files/1/0432/3731/0632/files/66780303435.pdf
    • https://cdn.shopify.com/s/files/1/0430/2890/6138/files/vudadanusuvov.pdf
    • https://cdn.shopify.com/s/files/1/0430/1278/4277/files/vabavaxaxusaselixagife.pdf
    • https://cdn.shopify.com/s/files/1/0436/8013/7369/files/4311510705.pdf
    • https://cdn.shopify.com/s/files/1/0433/2004/9822/files/14466234166.pdf
    • https://cdn.shopify.com/s/files/1/0432/4265/1816/files/3430186668.pdf
    • https://cdn.shopify.com/s/files/1/0433/6713/7438/files/wupubexaja.pdf
    • https://cdn.shopify.com/s/files/1/0434/7795/8816/files/17527045111.pdf
    • https://cdn.shopify.com/s/files/1/0428/8184/3356/files/28147387907.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_off000098f4.bin
3655f829f3d68e0a28e201bd66d60834d69ff447701051ae22d807ad80133b81		 pdf-font-stream PDF embedded font (sfnt) at offset 0x98F4 4888 bytes
font_01_sfnt_off0000a99a.bin
3089a3376134d7caa6570558949a69fa51d3b9209a03e13e3ae36fd6d8a0ee3c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA99A 10816 bytes
font_02_sfnt_off0000ce87.bin
77455bf50ae77681aaaad8027c5ab48f21e79d335a020db7a6be35294fce4a6a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCE87 16184 bytes

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