Malicious PDF — malware analysis report

Static analysis result for SHA-256 20343b3dd1f49c50…

MALICIOUS

PDF

45.3 KB Created: 2020-08-22 01:32:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0b30ff5798a491fc6c37c824e2fad76b SHA-1: bb032cad223abb76d698bd4eb76cd3f6e4ced2aa SHA-256: 20343b3dd1f49c50bc189922a4f8c969ea29efe8fde975e43b041b3e1347ad19
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector infrastructure at 'ttraff.com'. The document body, though heavily obfuscated, contains the same URL, suggesting a lure to a malicious site. The ML classifier also strongly flagged this PDF as malicious.

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=agent+bairavaa+songs++telugu
    • http://files.regenpreneur.com/uploads/1/3/2/7/132740814/vasubefevo.pdf
    • http://bevuvijod.thirdcharm.ca/uploads/1/3/1/4/131453536/jogakuvefuv-vowirugadug.pdf
    • https://cdn.shopify.com/s/files/1/0427/6623/7852/files/oracle_sql_queries_examples_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0433/4744/3865/files/trastorno_de_angustia_sin_agorafobia.pdf
    • https://cdn.shopify.com/s/files/1/0434/1799/3366/files/pamuzejedozimiritanogim.pdf
    • https://cdn.shopify.com/s/files/1/0433/4718/1718/files/calendario_rusia_2020_hora_peruana.pdf
    • https://cdn.shopify.com/s/files/1/0432/6939/0500/files/bevebozajejikewix.pdf
    • https://cdn.shopify.com/s/files/1/0434/9722/6402/files/resumen_categorias_gramaticales.pdf
    • https://cdn.shopify.com/s/files/1/0432/4855/0050/files/tixomolukoxixosepejar.pdf
    • https://cdn.shopify.com/s/files/1/0437/2666/7925/files/song_bhootni_ke_singh_is_king.pdf
    • https://cdn.shopify.com/s/files/1/0463/6252/5851/files/neet_2020_form_date.pdf
    • https://cdn.shopify.com/s/files/1/0438/2588/9442/files/81670719032.pdf
    • https://cdn.shopify.com/s/files/1/0433/2060/6885/files/sunavegamapuzugofuxujil.pdf
    • https://cdn.shopify.com/s/files/1/0430/0655/8359/files/motugomeledugixis.pdf
    • https://cdn.shopify.com/s/files/1/0430/7743/5556/files/76547422638.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/
    • https://cdn.shopify.com/s/files/1/043

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000658c.bin
eb9a1cda8e0a6673dcb6f6227386faf3ffc11b2cf786140dbda7ce215cea1617		 pdf-font-stream PDF embedded font (sfnt) at offset 0x658C 4924 bytes
font_01_sfnt_off00007661.bin
536b198ae3e0ed88e6d8521f913c66f29fed4c878144622b89b13d69bdb30460		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7661 10600 bytes
font_02_sfnt_off00009a6e.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9A6E 4324 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.