Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d7e94613607e567…

MALICIOUS

PDF

45.3 KB Created: 2020-08-08 15:18:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 26e53bd1dc261c81b176b5f196c79426 SHA-1: bd1c19328c964613fb3520ded3cef7bb84e132a9 SHA-256: 8d7e94613607e567ca9ae3f28d6deeece760c47910518a7c005c72875374f619
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, including one identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to 'austerity the history of a dangerous idea pdf download' and a URL that appears to be part of a link farm designed to manipulate search engine results. This suggests the PDF is intended to trick users into clicking malicious links, likely leading to further malware downloads or phishing attempts.

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=austerity+the+history+of+a+dangerous+idea+pdf+download
    • http://vofideset.cotuitharbortours.com/uploads/1/3/0/8/130874330/a6641e270.pdf
    • http://dowafobos.jeffreycobb.com/uploads/1/3/1/3/131398428/3760537.pdf
    • http://files.richmondbells.com/uploads/1/3/1/0/131070178/33970.pdf
    • http://files.sciencelife.org/uploads/1/3/1/4/131483002/7703c50.pdf
    • https://cdn.shopify.com/s/files/1/0432/8466/0380/files/pibek.pdf
    • https://cdn.shopify.com/s/files/1/0430/9575/2864/files/68513829807.pdf
    • https://cdn.shopify.com/s/files/1/0434/5570/9341/files/54015954567.pdf
    • https://cdn.shopify.com/s/files/1/0430/6151/0293/files/types_of_business_report_writing.pdf
    • https://cdn.shopify.com/s/files/1/0435/0096/1947/files/gajosag.pdf
    • https://cdn.shopify.com/s/files/1/0427/5005/0460/files/60146195638.pdf
    • https://cdn.shopify.com/s/files/1/0434/0688/5020/files/akai_xr20_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/7913659608.pdf
    • https://cdn.shopify.com/s/files/1/0437/8230/7989/files/17160723531.pdf
    • https://cdn.shopify.com/s/files/1/0427/4972/2790/files/86493362146.pdf
    • https://cdn.shopify.com/s/files/1/0431/2553/8970/files/91298617984.pdf
    • https://cdn.shopify.com/s/files/1/0437/4714/7928/files/sipufeziwep.pdf
    • https://cdn.shopify.com/s/files/1/0437/8315/9969/files/gajiroxamuku.pdf
    • https://cdn.shopify.com/s/files/1/0433/5311/2735/files/trust_deed_format_in_english.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_off000063b1.bin
3edbc1c658b33e1b836e7f4f267cd3d0d576235713d1a74bf54139f8dbcefd0b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63B1 5368 bytes
font_01_sfnt_off00007605.bin
6c9fc1176d22ab14319c06a19bba2cdeaad68076c2151ce0b2c214026a3dfb59		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7605 10392 bytes
font_02_sfnt_off00009994.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9994 4324 bytes

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