Malicious PDF — malware analysis report

Static analysis result for SHA-256 8bd845955571408e…

MALICIOUS

PDF

46.6 KB Created: 2020-08-09 09:10:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7969dd1c303a1c559d2704e5476fbf3f SHA-1: 88aae98d096f40ccdc8caca53c9c6c7321e07c82 SHA-256: 8bd845955571408e03ab5f03b449588588a85117fe0cf093d3a156613aca82c0
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains numerous embedded links, with one specifically identified as a malicious redirector. The document body, though heavily obfuscated, contains the text 'marine ecology textbook pdf' and a URL pointing to a redirector. This suggests a social engineering attempt to trick the user into clicking the malicious link, likely leading to further malware download or phishing. The presence of multiple Shopify URLs indicates a link farm strategy.

Heuristics 3

  • 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.
  • 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=marine+ecology+textbook+pdf
    • http://files.dhub09.com/uploads/1/3/1/4/131454984/3832329.pdf
    • http://files.anchoryourfootprint.com/uploads/1/3/1/6/131606011/591c8.pdf
    • http://files.josezayaspr.com/uploads/1/3/2/6/132680890/nevoje_zupabotipuvalop_marikug_niroziv.pdf
    • http://files.winshipart.com/uploads/1/3/1/4/131437194/7510410.pdf
    • http://files.benetvolleyball.org/uploads/1/3/1/8/131857115/1964443.pdf
    • https://cdn.shopify.com/s/files/1/0434/3152/6561/files/snap_hack_no_survey.pdf
    • https://cdn.shopify.com/s/files/1/0432/6889/8966/files/all_medical_laboratory_apparatus_and_their_uses.pdf
    • https://cdn.shopify.com/s/files/1/0431/3156/8277/files/23644998942.pdf
    • https://cdn.shopify.com/s/files/1/0438/7930/1288/files/najosezemibamonasanezip.pdf
    • https://cdn.shopify.com/s/files/1/0436/1597/7630/files/vuxojekodunula.pdf
    • https://cdn.shopify.com/s/files/1/0440/6001/6790/files/minecraft_attack_of_the_b-_team.pdf
    • https://cdn.shopify.com/s/files/1/0434/4181/5718/files/classroom_management_strategies_for_middle_school.pdf
    • https://cdn.shopify.com/s/files/1/0432/2571/0756/files/41518724470.pdf
    • https://cdn.shopify.com/s/files/1/0431/3110/9540/files/54312755101.pdf
    • https://cdn.shopify.com/s/files/1/0430/8231/7975/files/2001_honda_cbr_600_f4i.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000783d.bin
e7ace3da263dd336ebb16b5920862451be4e60d2df1d4d83d9844ff927622c43		 pdf-font-stream PDF embedded font (sfnt) at offset 0x783D 5524 bytes
font_01_sfnt_off00008b2f.bin
8c135c42fc6eb30f18a5179027472e74bcb1b87365357b1de824ea2c5a1e44e6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8B2F 10156 bytes

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