Malicious PDF — malware analysis report

Static analysis result for SHA-256 a312cb1daa950ef0…

MALICIOUS

PDF

35.2 KB Created: 2020-08-06 12:44:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: db9abdee64436e7cf0c8f952a8184343 SHA-1: d0b4f81951d1962ea5e6cec5378867d0203db152 SHA-256: a312cb1daa950ef0fb981771bc1e2ee564f7ff49a65c8b865643b50a0e4b4e15
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/pify?keyword=99+names+of+allah+poster+pdf', which is also flagged as a malicious redirector. The presence of many links hosted on Shopify and other domains suggests an attempt at SEO poisoning or a link farm to obscure the malicious destination. No scripts were extracted from this sample.

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=99+names+of+allah+poster+pdf
    • http://files.culpeperdentalassociates.com/uploads/1/3/0/8/130813846/toxokowiluxula-makileragebelef-regukijijo-romenegazin.pdf
    • http://files.endofbelief.org/uploads/1/3/0/9/130969003/vatusezipusofif_nonivoxujida.pdf
    • http://files.dileoenglish11h.com/uploads/1/3/1/4/131437919/xufiz-nipagip-seritofok.pdf
    • http://vowuwepa.mvrefusedistrict.com/uploads/1/3/0/9/130969465/vutiwozikutiwid-xuguwudoj.pdf
    • http://files.missnorthwestpageant.com/uploads/1/3/2/6/132680813/33d648c511c.pdf
    • https://cdn.shopify.com/s/files/1/0431/4015/3511/files/74475532938.pdf
    • https://cdn.shopify.com/s/files/1/0435/2750/4031/files/49108333780.pdf
    • https://cdn.shopify.com/s/files/1/0430/1724/0733/files/81303143979.pdf
    • https://cdn.shopify.com/s/files/1/0430/7550/2234/files/wokubomawovabaji.pdf
    • https://cdn.shopify.com/s/files/1/0428/8148/2919/files/rikepiwuj.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/80084587067.pdf
    • https://cdn.shopify.com/s/files/1/0431/3491/0618/files/70016456056.pdf
    • https://cdn.shopify.com/s/files/1/0432/7014/4166/files/60974550864.pdf
    • https://cdn.shopify.com/s/files/1/0428/8725/0087/files/zatifetutirenenabanozok.pdf
    • https://cdn.shopify.com/s/files/1/0430/6888/3098/files/rokufumiri.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/dedagefegumam.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004b06.bin
4059329799e3e68ba1342f92017a3ca98b54596fc6eab6863baa247eae3a6b8a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4B06 5340 bytes
font_01_sfnt_off00005d05.bin
71a90fcd588b1c169eb11a067bfd7c2183d9250e1192aadf174633fa8afcbff9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D05 10252 bytes

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