Malicious PDF — malware analysis report

Static analysis result for SHA-256 f02bfef97de469b3…

MALICIOUS

PDF

48.5 KB Created: 2020-08-22 13:15:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 85cca477cd53a6fd964b0c0beeb6d3ba SHA-1: a4b59401f58449c32c8c2f1acb235fa2a95f591a SHA-256: f02bfef97de469b3a832ed07f0839b9f681b47c072f4016cca2616096e4faead
120 Risk Score

Malware Insights

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

The PDF file contains multiple embedded URLs, with one specifically identified as a malicious redirector. The document body, though partially corrupted, includes text related to "converting metric units worksheet 5th grade" and the malicious URL, suggesting a lure to disguise the malicious intent. The presence of a link farm heuristic further indicates an attempt to distribute malicious content through numerous links. The file is identified as a PDF, and the heuristics indicate it's designed to redirect users to malicious infrastructure.

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.ru/pify?keyword=converting+metric+units+worksheet+5th+grade
    • http://kotim.eastsidefirst.com/uploads/1/3/1/6/131606343/02b3ad056ac222.pdf
    • http://bisaja.napacommercecenter.com/uploads/1/3/1/3/131384429/sunanop-vowojavuziva-dirixomonose-fijinigikibag.pdf
    • http://vowoxeva.southdevonslinglibrary.com/uploads/1/3/2/7/132740267/feratasupa-savepaxifikano-rusipuzit-kepazeve.pdf
    • https://cdn.shopify.com/s/files/1/0431/3877/7249/files/40154651042.pdf
    • https://cdn.shopify.com/s/files/1/0430/2484/2906/files/b_ed_form_date_2018_bihar.pdf
    • https://cdn.shopify.com/s/files/1/0434/0259/2410/files/59317548481.pdf
    • https://cdn.shopify.com/s/files/1/0428/9842/3967/files/38765637243.pdf
    • https://cdn.shopify.com/s/files/1/0438/2513/5776/files/vetotubifabikuloja.pdf
    • https://cdn.shopify.com/s/files/1/0432/7541/9798/files/78319442841.pdf
    • https://cdn.shopify.com/s/files/1/0427/8393/2582/files/9186841828.pdf
    • https://cdn.shopify.com/s/files/1/0438/6743/9259/files/athletic_body_in_balance_gray_cook.pdf
    • https://cdn.shopify.com/s/files/1/0434/5279/2982/files/bajaj_finserv_app_apk.pdf
    • https://cdn.shopify.com/s/files/1/0429/3532/0735/files/sports_team_logo_quiz_answers.pdf
    • https://cdn.shopify.com/s/files/1/0430/8035/1897/files/mamunaxexepono.pdf
    • https://cdn.shopify.com/s/files/1/0431/8127/7352/files/mevaxadodanemizej.pdf
    • https://cdn.shopify.com/s/files/1/0432/6552/3870/files/kojojokagokoremimipatoxaf.pdf
    • https://cdn.shopify.com/s/files/1/0435/4323/2661/files/26399972146.pdf
    • https://cdn.shopify.com/s/files/1/0429/3305/9737/files/active_and_passive_voice_worksheet_download.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_off00007659.bin
2d0567d32615ba812f92b5e53762c751098e2b4a175fcdc98e47f35fa65abce1
pdf-font-stream PDF embedded font (sfnt) at offset 0x7659 5564 bytes
font_01_sfnt_off00008939.bin
824d35b17c43ddafeab0f45eb04548c50a96509bfa39cf86977f36b63310c107
pdf-font-stream PDF embedded font (sfnt) at offset 0x8939 13592 bytes