Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d68c815044905cf…

MALICIOUS

PDF

136.2 KB Created: 2020-08-09 19:37:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 44353b637749c3a42ef5fa2f6bd11c50 SHA-1: ffac00ce6550cbf42a667fc55e85e9a0b70e5645 SHA-256: 0d68c815044905cf8baeb37574dcfcc93ee34fc2e8663216f7ab3ff54cf4fdcf
154 Risk Score

Malware Insights

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

The PDF contains numerous links, with a critical heuristic identifying a link to a known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that matches the redirector. This suggests the primary purpose is to redirect users to malicious content, likely for phishing or malware distribution.

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=american+english+file+2+pdf+free
    • http://files.mydynamictherapy.com/uploads/1/3/0/7/130775108/8414976.pdf
    • http://files.pinkturtledesigns.co.uk/uploads/1/3/0/7/130775747/ba76087889d42.pdf
    • http://files.bigfatsmile.io/uploads/1/3/1/0/131071289/0790a4398.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/32823332632.pdf
    • https://cdn.shopify.com/s/files/1/0434/0849/0663/files/78511269080.pdf
    • https://cdn.shopify.com/s/files/1/0433/4305/2953/files/convert_to_word_on_apple_mac.pdf
    • https://cdn.shopify.com/s/files/1/0434/0521/3854/files/gogemina.pdf
    • https://cdn.shopify.com/s/files/1/0429/1058/0903/files/zelevipubodekimeluju.pdf
    • https://cdn.shopify.com/s/files/1/0430/5934/7618/files/91532020122.pdf
    • https://cdn.shopify.com/s/files/1/0438/1173/3664/files/healing_back_pain_sarno.pdf
    • https://cdn.shopify.com/s/files/1/0428/6434/5255/files/rarexejumerek.pdf
    • https://cdn.shopify.com/s/files/1/0432/0477/1999/files/77161625175.pdf
    • https://cdn.shopify.com/s/files/1/0428/9118/2243/files/41771503327.pdf
    • https://cdn.shopify.com/s/files/1/0429/0212/6755/files/65654194019.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/36920421444.pdf
    • https://cdn.shopify.com/s/files/1/0434/7746/7288/files/kigizoluviguxonilenux.pdf
    • https://cdn.shopify.com/s/files/1/0431/5453/8658/files/6181147995.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_off0001bfa5.bin
1e5f3c4a702ef68f6d8f2479ef675a25efbef34866bee02451838781ef2a5d63		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1BFA5 5288 bytes
font_01_sfnt_off0001d15c.bin
333e363a99d507db99baeca375bcd2b39db7c21e513461b3ce2300a7da8160e8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1D15C 16696 bytes
font_02_sfnt_off00020518.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x20518 4324 bytes

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