Malicious PDF — malware analysis report

Static analysis result for SHA-256 023b9ca06166bacb…

MALICIOUS

PDF

34.0 KB Created: 2020-08-16 01:09:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 28563704f9f9b477ccbee2b567ca6299 SHA-1: d80ec692d5f1859ec54b6b26122b09a3048b87bc SHA-256: 023b9ca06166bacbe9d04a60f033146585fc732964e897519f3892ab4ca4310f
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by an ML classifier and contains numerous embedded links, many of which point to potentially malicious redirectors or SEO link farms. The primary malicious URL identified is 'https://ttraff.ru/pify?keyword=java+numberformat+locale+brasil', which is associated with known malicious redirector infrastructure. The document body, though heavily obfuscated, also contains this URL and other Shopify-hosted PDF links, suggesting a coordinated effort to distribute malicious content or engage in SEO spam.

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.ru/pify?keyword=java+numberformat+locale+brasil
    • http://wesepojud.letspartybouncers.com/uploads/1/3/1/6/131637308/xavegov-zozifukofolek.pdf
    • http://jabowal.gillespiecoalmuseum.org/uploads/1/3/1/6/131636725/b7d394b1c0996e.pdf
    • http://files.beyoungdesign.com/uploads/1/3/2/6/132695719/moxilatuvuku.pdf
    • http://files.garnavilloia.com/uploads/1/3/2/6/132695513/c53323f.pdf
    • http://fagivora.aakashsinghrathore.com/uploads/1/3/0/7/130776031/d6e58152d6f.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0440/0922/6398/files/php_foreach_array.pdf
    • https://cdn.shopify.com/s/files/1/0433/8722/4214/files/larokezikeb.pdf
    • https://cdn.shopify.com/s/files/1/0436/2692/2146/files/98763911302.pdf
    • https://cdn.shopify.com/s/files/1/0437/0703/9912/files/xenozawatijeditelofoli.pdf
    • https://cdn.shopify.com/s/files/1/0429/1782/2620/files/sumuxunaxowukokoleb.pdf
    • https://cdn.shopify.com/s/files/1/0432/2197/5197/files/78530265890.pdf
    • https://cdn.shopify.com/s/files/1/0436/7079/8489/files/tarifinulapukugasidaxigo.pdf
    • https://cdn.shopify.com/s/files/1/0435/5493/0839/files/linear_equations_and_inequalities_worksheet_answer_key.pdf
    • https://cdn.shopify.com/s/files/1/0432/2259/7800/files/mapamundi_para_colorear_con_nombres.pdf
    • https://cdn.shopify.com/s/files/1/0429/7588/7523/files/76822198450.pdf
    • https://cdn.shopify.com/s/files/1/0432/5956/0094/files/hp_probook_440_g5_i5_datasheet.pdf
    • https://cdn.shopify.com/s/files/1/0431/7410/1160/files/37929988604.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000049d4.bin
c24dabb1330689472947ac87522b10c7adc180d9d31e89651d2c835004efab0e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x49D4 5216 bytes
font_01_sfnt_off00005b82.bin
aa5953d55eb14b17cc113fba42f9c607de6b01da970fe4faef36badf6bdba66f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B82 9232 bytes

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