Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c82d40497c055d3…

MALICIOUS

PDF

39.3 KB Created: 2020-08-03 05:46:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: f63309870947bb35afd5c1e70f263263 SHA-1: 67f36e202b3f87f25e103590b07dedf6a23ff07c SHA-256: 0c82d40497c055d3006c4a0791745d5324cf30fa21a3cbdeb478be68f33621ff
194 Risk Score

Malware Insights

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

The PDF contains a link disguised as a 'Stihl fs 80 repair manual' that redirects to a malicious URL. This is a common lure for phishing or malware distribution, leveraging SEO tactics to appear legitimate. The embedded link farm further suggests an attempt to distribute malicious content broadly.

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=stihl+fs+80+repair+manual In PDF document text
    • http://files.tulsalines.com/uploads/1/3/1/1/131164239/7130656.pdfIn PDF document text
    • http://files.huntingtonschoolpto.org/uploads/1/3/1/4/131452836/vewanuluwuvo.pdfIn PDF document text
    • http://files.croptechseed.com/uploads/1/3/1/6/131606392/winowudodukav_duduluwifu_xejox_wejefowaluxe.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/1/0435/8239/0431/files/dasexoju.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6079/6318/files/xigebewinuwitoj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3284/5207/files/fukafufadawosofamaw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/7281/3211/files/8415553986.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5599/6328/files/bazawaxegubagidokan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0008/5149/files/kafunak.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/6788/2134/files/25063223945.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6951/2607/files/nanuluxopuwujazilugok.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8523/3304/files/70372478086.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3595/9202/files/xijeliwukokuxuxomuzipi.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_off000057dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x57DC 5580 bytes
SHA-256: 6e2aae4e4b0a85b993d534b723a62adbc6275b223a11b696fc677640ddbc0452
font_01_sfnt_off00006aaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6AAA 11812 bytes
SHA-256: 0fd08deb440fda14e7421ad167dc80cdba370cad86b8a89e95ea2ba7b6559141

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