Malicious PDF — malware analysis report

Static analysis result for SHA-256 afcdb6a2326df63c…

MALICIOUS

PDF

45.4 KB Created: 2020-08-15 18:43:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fb31c4dad27e93123293400ee6bba218 SHA-1: 9b07fb7909ad5a1858e929db6e7db1edab9657a8 SHA-256: afcdb6a2326df63cbdf9a546b4f17f5636d1c3f291012ec3a8150fc9e7375347
152 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with a critical heuristic firing for a PDF link farm. One of the primary links redirects to a known malicious infrastructure at 'ttraff.com'. The document body, though heavily obfuscated, also contains this URL and numerous other links to external PDFs hosted on various domains, suggesting a coordinated effort to distribute malicious content or manipulate search engine rankings. No scripts were extracted, but the sheer volume of links and the critical heuristic for malicious redirectors strongly indicate a 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.com/wb?keyword=single%20lever%20ceramic%20disc%20manual%20shower%20valve
    • http://files.thelovingpath.com/uploads/1/3/0/7/130740073/ginomujuxedij_girejevu_pazeg.pdf
    • http://files.throwercustomdesigns.com/uploads/1/3/1/6/131636807/kowagaxali.pdf
    • http://files.offthedeckgolf.com/uploads/1/3/1/6/131636712/bozuwabof-tulotebulaba-lozigawisowere.pdf
    • http://files.omeganulodi.org/uploads/1/3/2/3/132303134/60aa60424.pdf
    • https://cdn.shopify.com/s/files/1/0434/2883/9591/files/hallelujah_shrek_nuty.pdf
    • https://cdn.shopify.com/s/files/1/0438/9991/2344/files/44348195779.pdf
    • https://cdn.shopify.com/s/files/1/0428/4104/7206/files/pixefufesif.pdf
    • https://cdn.shopify.com/s/files/1/0435/8940/2779/files/fozonabififawinulad.pdf
    • https://cdn.shopify.com/s/files/1/0429/7723/1007/files/jemulojeben.pdf
    • https://cdn.shopify.com/s/files/1/0430/5282/6773/files/autocad_objective_questions_and_answers_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/9802/9733/files/44423517505.pdf
    • https://cdn.shopify.com/s/files/1/0429/1022/0447/files/mathematics_all_symbols_name.pdf
    • https://cdn.shopify.com/s/files/1/0431/1567/5809/files/13999176288.pdf
    • https://cdn.shopify.com/s/files/1/0437/1536/2984/files/true_magazines.pdf
    • https://cdn.shopify.com/s/files/1/0435/4444/5092/files/vekepafegofusavuzevuxo.pdf
    • https://cdn.shopify.com/s/files/1/0435/1708/3803/files/wujanagexekipovitilo.pdf
    • https://cdn.shopify.com/s/files/1/0437/2935/4917/files/big_ideas_simply_explained_series_download.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005038.bin
fdcdbce43448a3891207d1d5b4aaa939b980f9deb0f7a897a001807fe5d4595a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5038 5408 bytes
font_01_sfnt_off00006265.bin
08f98b02591475fc9a84fc85a555ce2efb847c89c788cd450c346c443142b783		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6265 9932 bytes
font_02_sfnt_off00008493.bin
64e13322576ebe4b9a20b8efdba1cb2c8bc01163a7c4e1ba1f667a2d7cf8e6df		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8493 16116 bytes
font_03_sfnt_off0000996c.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x996C 4324 bytes

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