Malicious PDF — malware analysis report

Static analysis result for SHA-256 852dd6b318ee3981…

MALICIOUS

PDF

42.5 KB Created: 2020-08-03 01:20:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 236fbac29287234713931f43a8f73fd9 SHA-1: 88dc2f66bfcab56e1447fa152b79a97a43a311ea SHA-256: 852dd6b318ee39813f9c4534608b78004d42fcfd85f47c1101a1d713419911d2
194 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to a redirector service, suggesting a link farm or phishing lure. The primary redirector URL is https://ttraff.cc/pify?keyword=helmet+heroes+hacks, which is flagged as malicious. The document body, though heavily obfuscated, contains this URL and other PDF links, indicating an attempt to drive traffic to potentially malicious sites. The ML classifier strongly supports the malicious verdict.

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.cc/pify?keyword=helmet+heroes+hacks In PDF document text
    • http://files.ellensalazar.com/uploads/1/3/2/8/132814949/2989405.pdfIn PDF document text
    • http://files.ayalalandalviera.com/uploads/1/3/1/6/131607093/jidabig-varotafekonix.pdfIn PDF document text
    • http://files.mindfulday.org/uploads/1/3/1/4/131453124/1632921.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/1/0428/0470/7491/files/46482669416.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zofoxi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7276/6631/files/88199392367.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8863/4263/files/52311182164.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7054/6329/files/visual_studio_redistributable.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9281/1669/files/venenatis_guide_osrs.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3603/3695/files/95401108505.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9672/7962/files/tusanapatomevopimuwa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5381/6728/files/52485229616.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5651/9585/files/pelir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/5733/0853/files/83891757620.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_off00006963.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6963 5064 bytes
SHA-256: 4ad4b78e649810234fd553a3c7aaea32febdcea84c73c1911821aef86a250b7c
font_01_sfnt_off00007a64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A64 10216 bytes
SHA-256: a441dca230eef2574f85c7c360980c45beca36610386cc16afbc9e6ca3f02df7

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