Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f05079c3cdbcc6a…

MALICIOUS

PDF

86.7 KB Created: 2020-07-27 10:09:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fa0add1afed5998c2129758315cde603 SHA-1: 32ebed5ae0c5fb9460747c78e7cfae3d9ed61dfb SHA-256: 6f05079c3cdbcc6a705de9bffa1f6208308876cd8222a40dcec6d49a63c332f6
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links to external PDF files, likely as part of a link farm or SEO manipulation tactic. One of the embedded URLs, 'https://ttraff.cc/pify?keyword=javascript+cheat+sheet+pdf', is identified as a malicious redirector. The document body, though heavily obfuscated, suggests a lure related to a "Javascript cheat sheet pdf".

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.cc/pify?keyword=javascript+cheat+sheet+pdf
    • http://files.heart2heartknittingfiberarts.com/uploads/1/3/0/7/130740483/siwogaruzoturodularo.pdf
    • http://files.abundantgracesparta.org/uploads/1/3/0/7/130739742/purer.pdf
    • http://files.magiqatlas.com/uploads/1/3/0/7/130739265/zowadure_dimireno.pdf
    • http://files.nsainapparel.com/uploads/1/3/1/8/131856306/7650961.pdf
    • http://files.artisticawardsbyjoebourne.com/uploads/1/3/1/4/131483955/4729f4e4bbc80da.pdf
    • https://cheatography.com
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/4170/8453/files/gimudijol.pdf
    • https://cdn.shopify.com/s/files/1/0428/4622/4551/files/vajodufazurenopezas.pdf
    • https://cdn.shopify.com/s/files/1/0431/2429/3796/files/95337800624.pdf
    • https://cdn.shopify.com/s/files/1/0429/9915/2799/files/xedoviz.pdf
    • https://cdn.shopify.com/s/files/1/0434/4214/3397/files/70891268684.pdf
    • https://cdn.shopify.com/s/files/1/0439/1020/1499/files/ximamusapidiwuveperofu.pdf
    • https://cdn.shopify.com/s/files/1/0428/6640/9639/files/bovideguzixuvu.pdf
    • https://cdn.shopify.com/s/files/1/0432/4474/8950/files/12271013187.pdf
    • https://cdn.shopify.com/s/files/1/0427/4028/5607/files/ginisifajexokitob.pdf
    • https://cdn.shopify.com/s/files/1/0435/9385/9231/files/18268999665.pdf
    • https://cdn.shopify.com/s/files/1/0432/9570/3204/files/49006287226.pdf
    • https://cdn.shopify.com/s/files/1/0432/6401/6539/files/worawizimefebuxajekivu.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb6b.bin
054baa4b1dc65902f11e14aa2530a886e94ca9b9f5237126fd7fe4136e4d84ba		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEB6B 4832 bytes
font_01_sfnt_off0000fbe3.bin
21a7146106e2ad29a4dcc6aa55cee169416400570e2b3d493b6d071cb256f2f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFBE3 1936 bytes
font_02_sfnt_off00010525.bin
865e998cb2cdc8e1fa3544be0716f5ec27d72f8e39b50237b2538b03c39b7e61		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10525 15556 bytes
font_03_sfnt_off0001360b.bin
2908c71a73812f4dbbe924f85feb1de9e16d69baa71a945eb870efde3fff0373		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1360B 16120 bytes

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