Malicious PDF — malware analysis report

Static analysis result for SHA-256 99d034c0fc3ccf4e…

MALICIOUS

PDF

50.7 KB Created: 2020-08-03 06:46:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: be7984a5dbcadc21aaff5c87ae0fb988 SHA-1: bee051527e2e99637ce92b9d370cd31498f401bd SHA-256: 99d034c0fc3ccf4e4c22c3b0f002bb7b8414da6884fdd6274ac88da0bb626199
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by multiple critical heuristics for containing malicious redirector links and a large link farm. The embedded links likely serve to obscure the ultimate destination of the malicious content, which is a common tactic for phishing or malware distribution. The ML classifier also strongly indicated maliciousness.

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.ru/pify?keyword=background+image+opacity In PDF document text
    • http://files.burgandysings.com/uploads/1/3/1/3/131398360/3c03613db03b43f.pdfIn PDF document text
    • http://files.daviegaragedoornc.com/uploads/1/3/1/4/131437822/2306286.pdfIn PDF document text
    • http://files.cebhalifax.com/uploads/1/3/1/3/131379343/pudutipenim.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/1/0432/0804/8808/files/jezesowo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2698/7680/files/tikogedewikizi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6334/4280/files/8944075887.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0640/2453/files/92930326906.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2208/1448/files/gipimu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3539/2150/files/wokevagegaj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5834/0774/files/lotolumuz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/44240048578.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0012/6880/files/wubivogumogumebilatazat.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7656/7711/files/xofirurobuzijakekonibilod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0510/0711/files/dejorenusu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1220/2389/files/kemulizowavo.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 5

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_off00007dbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7DBC 5396 bytes
SHA-256: 36c60975d12d3279d8d147860986817ede788564ef1f082cbfcde169c75eb8b7
font_01_sfnt_off00009011.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9011 14180 bytes
SHA-256: fda5d41916f971014a8c05d5864fc2718b5c3ad4676075b5972d5fde9a6258c6

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