Malicious PDF — malware analysis report

Static analysis result for SHA-256 3816f6318ca50615…

MALICIOUS

PDF

44.0 KB Created: 2020-08-16 23:00:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b36a7083d5ba10bc06d0f7197f158ec3 SHA-1: 1ee7991687cb07722c12fc0c6490c904d79f5cac SHA-256: 3816f6318ca506159c7e955c6e62cf336cdfd8c4f5bb685e017f048e4af1958c
162 Risk Score

Malware Insights

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

The PDF contains a link farm and a malicious redirector URL disguised as a search result for 'Bluestacks 3 for windows 7 laptop'. The ML classifier strongly indicated maliciousness. The primary malicious IOC is the redirector URL, which likely leads to a further stage of the attack. No scripts were extracted, limiting the analysis of the attack's full scope.

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.
  • SEO-redirector lure link (multi-word utm_term) low PDF_SEO_UTM_REDIRECTOR_LINK
    PDF contains a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the search-keyword gateway used by the 'free document download' phishing family. Surfaced as an IOC; on its own this is a low-confidence signal.
  • 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/pify?keyword=bluestacks+3++for+windows+7+laptop In PDF document text
    • http://files.gavinwelshfarriery.co.nz/uploads/1/3/1/4/131409761/jobewirerujofafi.pdfIn PDF document text
    • http://wolare.economiczhang.com/uploads/1/3/0/7/130739415/vepudikexizis-durukuxewituteg.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/1/0427/9032/2342/files/95987000239.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2990/5058/files/3974461122.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5689/6927/files/68854875917.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6196/8025/files/c_language_programming.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3033/2060/files/cpu_temperature_windows_10.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/3023/1712/files/vinevobevodes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8735/4270/files/14262774438.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1035/7405/files/2152356874.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9839/7085/files/famunezon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2439/2087/files/mitosis_stages_diagram.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5478/3893/files/tekuduz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8680/7201/files/90541081409.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4547/7783/files/42824822460.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4398/6327/files/siguwumopikaxufux.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

Related samples 3

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006cda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CDA 5600 bytes
SHA-256: 921f1bff27ae1cd441279bc4a5604985344866ea7a3eed63081f4a7dd3e78791
font_01_sfnt_off00008008.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8008 10280 bytes
SHA-256: 4aaeed09e1414484a03db5b5cd82e9e333d5b2caee788904be4d5356d703a022

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