Malicious PDF — malware analysis report

Static analysis result for SHA-256 645f89773fc6f412…

MALICIOUS

PDF

43.4 KB Created: 2020-08-25 09:29:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 157647a4bb231da1f24b7f1a8575d9bd SHA-1: 2f9ac9e968c91d12c6921688612bcbaac490491b SHA-256: 645f89773fc6f41208b89f1813c64d819f7ecf210c4a95086053d31d70b9b7de
154 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to what appears to be a link farm designed to manipulate search engine results. One critical heuristic identified a link to known malicious redirector infrastructure, specifically `https://ttraff.ru/pify?keyword=eviction+notice+template+ontario`. This suggests the document is part of a phishing or scam campaign, using a seemingly legitimate lure to direct users to malicious sites.

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=eviction+notice+template+ontario
    • http://wepuzatuj.luciearcher.com/uploads/1/3/2/6/132682883/xunubokefavukip-mobajika-latipit-josimirebenu.pdf
    • http://files.meatandpieco.com/uploads/1/3/1/4/131437363/gunupidamonuk_mejovivabetivad.pdf
    • http://files.francesandkevin2019.org/uploads/1/3/0/7/130776177/bagivetixada.pdf
    • http://files.falmouthwaterfront.com/uploads/1/3/1/3/131383581/fanalipe.pdf
    • http://files.prepvisionconsulting.com/uploads/1/3/1/8/131871687/lifakabodopap-rodebewulu-diwinaxawad-pixenugilaj.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/2301/5841/files/qcm_bromatologie.pdf
    • https://cdn.shopify.com/s/files/1/0433/7690/2309/files/aceable_drivers_ed_answers_chapter_1.pdf
    • https://cdn.shopify.com/s/files/1/0437/0910/4279/files/please_check_gdb_is_codesigned.pdf
    • https://cdn.shopify.com/s/files/1/0429/6412/3814/files/agario_hack_coins_apk.pdf
    • https://cdn.shopify.com/s/files/1/0432/6585/1560/files/72294632032.pdf
    • https://cdn.shopify.com/s/files/1/0430/7327/4018/files/bitegepofalekukija.pdf
    • https://cdn.shopify.com/s/files/1/0431/7623/1063/files/vepusarume.pdf
    • https://cdn.shopify.com/s/files/1/0429/5865/1545/files/lv_car_insurance_certificate.pdf
    • https://cdn.shopify.com/s/files/1/0437/0723/6503/files/game_maker_studio_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0437/8879/6064/files/94434987278.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006da7.bin
005e3eb60d11c2e1cc988dc88f108673c2476600227c5966518eba6ea7b6cde6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DA7 4916 bytes
font_01_sfnt_off00007e47.bin
43e5e7354334ca1417fcea5578361f39c9e7336785dd2113bc1eba6e34ed11a8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E47 10660 bytes

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