Malicious PDF — malware analysis report

Static analysis result for SHA-256 09a4da0613530c3e…

MALICIOUS

PDF

44.9 KB Created: 2020-08-24 01:54:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3f4a1789a638408402ce54bb61ac14b7 SHA-1: f4b6f575134d1d4f506061663ee789946ac1f744 SHA-256: 09a4da0613530c3ee126208114617e38f1555600a147b35e96cb53525c2c3125
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic identifying a link to a known malicious redirector infrastructure at 'https://ttraff.cc/pify?keyword=gmbinder+formatting+guide'. The document body, though heavily obfuscated, also contains this URL and other links to PDF files hosted on various domains. This suggests an attempt to direct users to malicious content, likely for phishing or malware delivery.

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=gmbinder+formatting+guide
    • http://files.biesebroek.eu/uploads/1/3/0/7/130739101/83e9c77.pdf
    • http://sitotuk.nicolecroftyoga.com/uploads/1/3/2/6/132681579/80cc8.pdf
    • http://files.jasonmyerson.com/uploads/1/3/1/6/131606878/d1bf0a20.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/7218/2685/files/core_temp_rainmeter.pdf
    • https://cdn.shopify.com/s/files/1/0435/5542/2369/files/sulphuric_acid_safety_data_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0430/5040/1943/files/58980871510.pdf
    • https://cdn.shopify.com/s/files/1/0446/4944/7587/files/bistable_multivibrator_using_555.pdf
    • https://cdn.shopify.com/s/files/1/0431/5712/7336/files/1987_vw_cabriolet.pdf
    • https://cdn.shopify.com/s/files/1/0434/3939/0872/files/adobe_indesign_trial.pdf
    • https://cdn.shopify.com/s/files/1/0449/9534/6590/files/bv_ramana_higher_engineering_mathematics_solutions_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/6097/7048/files/zagisalirupukutabubuk.pdf
    • https://cdn.shopify.com/s/files/1/0429/4498/7292/files/sears_allstate_motorcycle.pdf
    • https://cdn.shopify.com/s/files/1/0431/4015/3505/files/gokovukozididugekixijitat.pdf
    • https://cdn.shopify.com/s/files/1/0430/8310/4409/files/golomogador.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006817.bin
8080c05222878c3156824ee674b585703113cce66f1219055ebe86457cfc9ad5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6817 5188 bytes
font_01_sfnt_off000079a2.bin
7f7e60d28c7508a493c6893c15c0e19de458bf06e1584b737c93d322ea813cdf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79A2 2604 bytes
font_02_sfnt_off000084ec.bin
c6bd13c21e83caba82e8a150e2d087f2d647831c88e611f03f56697b7c462df4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x84EC 9956 bytes

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