Malicious PDF — malware analysis report

Static analysis result for SHA-256 17897fa9d9d24250…

MALICIOUS

PDF

43.4 KB Created: 2020-10-09 11:15:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 29bf153615ec53bc5f4fea12e0eaa787 SHA-1: 98f69c115ee24c76113e05228f7f1ecda6da9a02 SHA-256: 17897fa9d9d242503aab6141f150afd7b66d038661ff2c3dcc6a805fed1828a0
184 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links pointing to disposable domains, indicating a link farm designed to manipulate search engine results or redirect users to malicious content. The presence of a link to known malicious redirector infrastructure further supports this. Although no scripts were explicitly extracted, the structure and heuristics strongly suggest a malicious intent to drive traffic to potentially harmful sites.

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://cctraff.ru/pify?keyword=dig+drip+irrigation+home+depot In PDF document text
    • http://nubopa.windhofcareers.com/uploads/1/3/0/7/130739663/kigodaji.pdfIn PDF document text
    • http://files.mvmahalo.com/uploads/1/3/1/3/131379057/fanurojijiparoxapedi.pdfIn PDF document text
    • http://files.healinghopeproject.org/uploads/1/3/2/6/132695568/rufivupejosejon_xilibetufe.pdfIn PDF document text
    • http://bitipise.rosedalehorseshow.com/uploads/1/3/1/4/131406352/diparedi-xafagusowesum.pdfIn PDF document text
    • http://votexuko.lovegodblesspeople.com/uploads/1/3/0/7/130775598/sowelukixofimigedon.pdfIn PDF document text
    • https://site-1036629.mozfiles.com/files/1036629/wuzinoduxifejekavuxede.pdfIn PDF document text
    • https://site-1044164.mozfiles.com/files/1044164/50312305242.pdfIn PDF document text
    • https://site-1041614.mozfiles.com/files/1041614/migupekobivapowi.pdfIn PDF document text
    • https://site-1037085.mozfiles.com/files/1037085/84311837837.pdfIn PDF document text
    • https://site-1036764.mozfiles.com/files/1036764/82604782109.pdfIn PDF document text
    • https://site-1043844.mozfiles.com/files/1043844/wupedavulivumuk.pdfIn PDF document text
    • https://site-1037074.mozfiles.com/files/1037074/71190306054.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4017/8333/files/welcome_to_roblox_building_wiring.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/3447/1318/files/toppers_promo_code_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3625/4101/files/ferrofluid_material_safety_data_sheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5573/5199/files/93500403852.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/9755/3064/files/rice_cooker_price_in_nepal.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_off00006bd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BD3 5160 bytes
SHA-256: 0b9c32c573a27a99a0586b8a9d8fce1bbe4b1db5d71997164ca7aee25d7644f5
font_01_sfnt_off00007d39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D39 10312 bytes
SHA-256: b6c136010c0937190d9f033853261f627325c79c606d73b940b7243f83d867e2

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