Malicious PDF — malware analysis report

Static analysis result for SHA-256 e26b802e1b1ac92b…

MALICIOUS

PDF

40.3 KB Created: 2020-08-24 14:11:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 12de9a09c113ae624bf698290be240f7 SHA-1: 90d32416070c5c091823552eceeff242237d668c SHA-256: e26b802e1b1ac92b1bc2fd9a84c6b937e14d90e21249cbb498f5f8abdf067765
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 indicating a link to a known malicious redirector infrastructure at 'ttraff.com'. The document body, though heavily obfuscated, contains text related to 'Autocad civil 3d tutorial pdf 2015', suggesting a lure to disguise the malicious intent. The presence of a link farm heuristic further supports the malicious nature, aiming to distribute traffic to various potentially compromised or malicious sites.

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=autocad+civil+3d+tutorial+pdf+2015
    • http://files.independentauthornetwork.com/uploads/1/3/1/4/131482968/kewokuxubed.pdf
    • http://noxokan.thegrassyknollfarm.com/uploads/1/3/1/8/131856655/gobituboxusizorogobo.pdf
    • http://rikive.whhcpt.co.nz/uploads/1/3/2/7/132740978/8301442.pdf
    • http://files.unlvhosa.com/uploads/1/3/0/8/130873794/8868675.pdf
    • https://cdn.shopify.com/s/files/1/0437/6811/9448/files/jukezuxaxofumupokatopamit.pdf
    • https://cdn.shopify.com/s/files/1/0439/5443/8302/files/free_printable_calendar_template_march_2018.pdf
    • https://cdn.shopify.com/s/files/1/0429/7759/1449/files/axios_formdata_append_array.pdf
    • https://cdn.shopify.com/s/files/1/0437/2194/9335/files/ogre_kingdoms_army_book.pdf
    • https://cdn.shopify.com/s/files/1/0434/7042/2180/files/ravetipowizanogoguwa.pdf
    • https://cdn.shopify.com/s/files/1/0438/8978/7048/files/botany_books_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0438/7792/5019/files/appalachian_trail_packing_guide.pdf
    • https://cdn.shopify.com/s/files/1/0428/5110/6972/files/joxojepubemixitexageb.pdf
    • https://cdn.shopify.com/s/files/1/0431/1715/0368/files/15951410295.pdf
    • https://cdn.shopify.com/s/files/1/0428/9055/9655/files/dibelixokofigefibivuxanu.pdf
    • https://cdn.shopify.com/s/files/1/0429/8833/9361/files/pewogubuzu.pdf
    • https://cdn.shopify.com/s/files/1/0433/1238/2117/files/gasowekimufufolifomom.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_off00005fc2.bin
f8c47976c53e4826ad2d90b6e23499e6d499bd154a33be7f87b6925b9274ee5e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FC2 5632 bytes
font_01_sfnt_off00007308.bin
0064632e762f8be900bd510e7b84ab61b92d4d62fc16160fe801c59f93853fa3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7308 9820 bytes

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