Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6dadb3023c515f3…

MALICIOUS

PDF

57.4 KB Created: 2020-08-24 02:46:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f991900a44c9df2246edff1b373067bb SHA-1: 1591087d9341c37f1fac7baa96ac1cfc62f3459f SHA-256: f6dadb3023c515f333c89d8954b546f3b7cc77bb382aeb3d924f4c572ab2eea9
152 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as a puppy feeding guide. This link points to ttraff.com, which is known for redirecting to malicious sites. The PDF also contains a large number of external links, many hosted on Shopify, suggesting a link farm or SEO manipulation tactic to distribute malicious content. The ML classifier strongly indicated maliciousness.

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=boston+terrier+puppy+feeding+guide
    • http://files.paqu.org/uploads/1/3/1/8/131871894/vibofukupu_ruzererijolibij.pdf
    • http://files.joshsaleh.com/uploads/1/3/0/7/130739112/pitewibazowu.pdf
    • http://bisari.seattleapartmentfinders.com/uploads/1/3/1/4/131406717/bf34ee1.pdf
    • http://duvisale.escaperoomelectronics.com/uploads/1/3/1/3/131380467/8259920.pdf
    • http://files.hareloomupholstery.com/uploads/1/3/0/7/130776058/donuremeju.pdf
    • https://cdn.shopify.com/s/files/1/0433/7437/9158/files/3984187827.pdf
    • https://cdn.shopify.com/s/files/1/0436/4288/0160/files/auto_air_conditioning_repair_manual.pdf
    • https://cdn.shopify.com/s/files/1/0430/6649/1031/files/terraria_creative_mode.pdf
    • https://cdn.shopify.com/s/files/1/0432/2135/2606/files/exponential_growth_and_decay_worksheet_calculus.pdf
    • https://cdn.shopify.com/s/files/1/0431/8865/0135/files/the_warren_buffett_way.pdf
    • https://cdn.shopify.com/s/files/1/0429/2539/2035/files/65290958148.pdf
    • https://cdn.shopify.com/s/files/1/0430/5793/8581/files/jezizuvabedubo.pdf
    • https://cdn.shopify.com/s/files/1/0433/8365/2506/files/nidumeromezis.pdf
    • https://cdn.shopify.com/s/files/1/0433/6461/4303/files/42847179720.pdf
    • https://cdn.shopify.com/s/files/1/0446/6409/4873/files/jiruvo.pdf
    • https://cdn.shopify.com/s/files/1/0432/0909/7376/files/analytical_reasoning_mcqs_with_answers_nts.pdf
    • https://cdn.shopify.com/s/files/1/0432/6467/1909/files/pomekixojokibeno.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000099d1.bin
3942b7baa616934eb6db089af587ada88bf059704e502530bc005d6ac364932d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x99D1 5116 bytes
font_01_sfnt_off0000ab4d.bin
daad3f347a4f42f432ee9983e619a7c063e36761dba5934b469418034847e28e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAB4D 1800 bytes
font_02_sfnt_off0000b3db.bin
f0f64f0ebee7044e7260a781fa2742807ca48ce78dcf8f9233622c3628f12b4c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB3DB 10568 bytes

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