Malicious PDF — malware analysis report

Static analysis result for SHA-256 82a8e9d491967f0e…

MALICIOUS

PDF

34.8 KB Created: 2020-07-10 05:48:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-24
MD5: 485c9aa6a9814a92faa211e4822ffb95 SHA-1: 76017b66ce0f44dea163a0928ff4234cad3c4be7 SHA-256: 82a8e9d491967f0ec1225bb71e38a619b0558d738b9031d84e1ac2f6b88e2aac
184 Risk Score

Malware Insights

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

The PDF document contains a lure related to a microwave manual, which is a common tactic for phishing or scam attempts. It embeds numerous links, including one to a known malicious redirector at 'ttraff.cc', and many others hosted on disposable domains, indicating a link farm designed to distribute malicious content. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is part of a malicious campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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.cc/wb?keyword=whirlpool%20microwave%20wmh31017fw-0%20manual In PDF document text
    • http://files.deannastrasse.com/uploads/1/3/0/8/130874305/mipipusa.pdfIn PDF document text
    • http://files.wegnerauctioneers.com/uploads/1/3/0/7/130739463/0a523072.pdfIn PDF document text
    • http://files.a2therapyworks.com/uploads/1/3/0/8/130813025/tipikemege-gogenajuzuzuga.pdfIn PDF document text
    • http://files.wakingthedead.org/uploads/1/3/2/8/132815175/damupunaxexu.pdfIn PDF document text
    • http://files.evolutionrattery.com/uploads/1/3/2/6/132695516/silej.pdfIn PDF document text
    • http://files.yunkawasiperu.org/uploads/1/3/1/3/131379612/vizarifogumawov.pdfIn PDF document text
    • http://files.arkjprogram.com/uploads/1/3/1/4/131406274/baruti-xukitinapabuz.pdfIn PDF document text
    • http://files.lewiswarburg.com/uploads/1/3/1/3/131379115/vaxikofojenitovozex.pdfIn PDF document text
    • http://files.wesleyantheology.com/uploads/1/3/0/8/130874544/76514.pdfIn PDF document text
    • http://files.steveinfo.com/uploads/1/3/1/0/131070379/2415530.pdfIn PDF document text
    • http://files.artartine.com/uploads/1/3/1/4/131437147/6261767.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://wumegubutil.files.wordpress.com/2020/07/91268721935.pdfIn PDF document text
    • https://nizulaxowamo181495606.files.wordpress.com/2020/06/525762489.pdfIn PDF document text
    • https://vimajuzerox.files.wordpress.com/2020/06/28616471027.pdfIn PDF document text
    • https://jetufaru.files.wordpress.com/2020/06/5243181927.pdfIn PDF document text
    • https://pawisizepetu.files.wordpress.com/2020/06/85507701683.pdfIn PDF document text
    • https://jazutog.files.wordpress.com/2020/07/setixujidire.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/45235944591.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/winoxilerudizixadejugo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/bifivejeg.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/84113106953.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nosisuzamozozi.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004a66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4A66 5512 bytes
SHA-256: 01e3f09745836100930ff26f29f5fa43b645b8b3f600321c314f5f2126f594a0
font_01_sfnt_off00005d1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D1F 9536 bytes
SHA-256: cc8d7e11acac4bbce4288e2e8ce859e52af04562509d1d98d2bdeb088f8f0e9a