Malicious PDF — malware analysis report

Static analysis result for SHA-256 35e734abb4d4569e…

MALICIOUS

PDF

41.8 KB Created: 2020-08-10 03:13:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1a9b720db97801fc37d52cd4bb9c266e SHA-1: 803b8215cdb85a93fb29441dfdc4b1256bba33c3 SHA-256: 35e734abb4d4569ee8f4aa1e16f88d0a04f2ab2dd5319c02426184413eb28e0d
152 Risk Score

Malware Insights

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

The PDF file contains a malicious redirector link pointing to 'ttraff.com', which is designed to lead users to a link farm of numerous other PDF documents hosted on various domains. This indicates a social engineering tactic to distribute potentially malicious content or lead users to further malicious sites. The ML classifier strongly supports the malicious nature of this 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.com/pify?keyword=spanish+physical+description+worksheet+pdf
    • http://jasajilek.yogadansebienetre.com/uploads/1/3/1/3/131383791/06dff6eab6f2.pdf
    • http://files.sacredeyeofthefalcon.com/uploads/1/3/1/4/131438211/bisufol-kaxarera-nifaxafeve-ruduzexipugugo.pdf
    • http://goretijes.solutions-guides.com/uploads/1/3/1/6/131607095/bonalat-vazawikupizox.pdf
    • http://files.okohstudio.com/uploads/1/3/1/4/131437149/6184857.pdf
    • http://pubomo.redgateessentials.com/uploads/1/3/2/8/132814930/1662543.pdf
    • https://cdn.shopify.com/s/files/1/0438/3545/7696/files/addition_and_subtraction_of_decimals_word_problems.pdf
    • https://cdn.shopify.com/s/files/1/0439/8622/3262/files/banking_regulation_act_short_notes.pdf
    • https://cdn.shopify.com/s/files/1/0431/3638/5175/files/adiabatic_demagnetization_refrigerator.pdf
    • https://cdn.shopify.com/s/files/1/0429/0360/1308/files/67933711326.pdf
    • https://cdn.shopify.com/s/files/1/0429/3437/0470/files/reperudokemezorevixa.pdf
    • https://cdn.shopify.com/s/files/1/0430/2936/4889/files/metaphysical_poetry.pdf
    • https://cdn.shopify.com/s/files/1/0433/5743/8101/files/guitar_chords_chart_for_beginners.pdf
    • https://cdn.shopify.com/s/files/1/0435/1285/6731/files/xatekuwabijemu.pdf
    • https://cdn.shopify.com/s/files/1/0432/8787/1646/files/24778094970.pdf
    • https://cdn.shopify.com/s/files/1/0431/9143/5422/files/guragigixaredomiwesog.pdf
    • https://cdn.shopify.com/s/files/1/0433/9331/9079/files/bijekaxinulajutafe.pdf
    • https://cdn.shopify.com/s/files/1/0432/9986/4734/files/fulamubijulavuvatazu.pdf
    • https://cdn.shopify.com/s/files/1/0433/5091/7269/files/file_open_test.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_off0000642f.bin
813d9871a5291ec3e1dbbf116ce4e5fac5e322e774e00f72b5a3906a0faf0d97		 pdf-font-stream PDF embedded font (sfnt) at offset 0x642F 5604 bytes
font_01_sfnt_off00007751.bin
8e8a3a6503a29ba923f3ae5bc2c49e9c83df24e095756b97b02123e1612fcaec		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7751 10132 bytes

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