Malicious PDF — malware analysis report

Static analysis result for SHA-256 d172881e422e17dd…

MALICIOUS

PDF

41.3 KB Created: 2020-07-27 20:22:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ac201c49a2a500de89c9c5c53209c993 SHA-1: 1dcfd67a29c1c09501f206763cc3dd3412d77c87 SHA-256: d172881e422e17dd755ed10175e23b41e1ac3bfab98003501c15e7eb34bf3f3f
194 Risk Score

Malware Insights

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

The PDF contains numerous links, with one specifically pointing to a known malicious redirector. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, appears to be a lure related to Android development, likely intended to disguise the malicious intent of the embedded links. The primary attack vector is likely a phishing attempt leveraging these links to redirect users to malicious content.

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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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.com/pify?keyword=android+studio+floating+action+button+background+color In PDF document text
    • http://files.sandcastletreasures.com/uploads/1/3/0/7/130739918/952efea14f99d.pdfIn PDF document text
    • http://files.myscrubsandmore.com/uploads/1/3/1/6/131606396/2019712.pdfIn PDF document text
    • http://files.stanleyboxing.com/uploads/1/3/2/6/132695200/8ed68fc.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/1/0433/0687/7080/files/51098187394.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3131/4077/files/nuvekajotor.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4605/0714/files/puzebefesepakebo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/98455436519.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8184/3353/files/91494072165.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6097/6021/files/56793904431.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5788/0996/files/xelivewexinozof.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5589/6990/files/32386401908.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0868/7269/files/94151888901.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/0542/5310/files/85734768144.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8353/8331/files/liwopawabisit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7673/0533/files/18781268728.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 8

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_off00006146.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6146 5148 bytes
SHA-256: 5b33c085c81c98f575aede91ea57e1e4316f1fe508f822c0e0630e9f34c6a697
font_01_sfnt_off000072ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72CA 10924 bytes
SHA-256: cf0d8037e1d88305871db91d60d25e52d005725839c581e90bfb35ca23ae061a

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