Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a88386458d95b1b…

MALICIOUS

PDF

36.6 KB Created: 2020-08-14 12:14:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9705d0048b21242ceea88914283fd869 SHA-1: befa68e17b7802d5ebf14d825c1597d0f7d0a57f SHA-256: 5a88386458d95b1b66f8fb32f28e0f5505b2fcd6e0c2ad619f74bbd9127ddcc7
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with the primary one leading to a known malicious redirector. The document body, though obfuscated, contains text related to 'dust sheets' and includes the malicious URL, suggesting a lure to a phishing or malware distribution site. The ML classifier strongly indicated maliciousness, supporting the presence of a malicious redirector.

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=dust+sheets+to+cover+furniture
    • http://files.progressiondaily.us/uploads/1/3/1/4/131453674/bonanadija.pdf
    • http://files.vytru.com/uploads/1/3/1/6/131606060/5706210.pdf
    • http://files.therapeutic-connections.net/uploads/1/3/0/8/130874559/wutoketapojobosig.pdf
    • http://files.goodarch2us.com/uploads/1/3/0/8/130874233/9372698.pdf
    • http://files.winstondavenport.com/uploads/1/3/1/1/131163601/luxepebimefep-luvoz-maxuvovukivofir.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0427/5293/4044/files/3282940602.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/15636630427.pdf
    • https://cdn.shopify.com/s/files/1/0427/9212/4572/files/body_beast_workout_schedule.pdf
    • https://cdn.shopify.com/s/files/1/0429/1415/2607/files/xokilogoledijazurum.pdf
    • https://cdn.shopify.com/s/files/1/0439/8150/4670/files/boxobu.pdf
    • https://cdn.shopify.com/s/files/1/0428/2351/6323/files/sexovigosazewokizuxare.pdf
    • https://cdn.shopify.com/s/files/1/0432/5248/2208/files/83851008540.pdf
    • https://cdn.shopify.com/s/files/1/0444/4015/8374/files/linus_tech_tips_instagram.pdf
    • https://cdn.shopify.com/s/files/1/0432/7879/4917/files/fujidufedadugekefa.pdf
    • https://cdn.shopify.com/s/files/1/0432/2007/4657/files/40028982988.pdf
    • https://cdn.shopify.com/s/files/1/0437/0982/5176/files/79657520581.pdf
    • https://cdn.shopify.com/s/files/1/0432/9046/0324/files/button_mushroom_compost_formula.pdf
    • https://cdn.shopify.com/s/files/1/0450/6681/3590/files/defumimuzikifo.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_off000050d6.bin
213afc0f493b8a7916dbf018df045ef3d179962eeba72d67bd27cd0456655bee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x50D6 4788 bytes
font_01_sfnt_off00006128.bin
3a12b48c295efaf01bbb16cbf341d3743dc6a7d791b423247f21de2f867b8fc4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6128 10604 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.