Malicious PDF — malware analysis report

Static analysis result for SHA-256 823b5c516f2353c1…

MALICIOUS

PDF

33.3 KB Created: 2020-08-01 02:15:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 788e32b3b5f09833da4ec101249373b0 SHA-1: 30cfe0f9e9d4e512395b051ff05ed77997bfa745 SHA-256: 823b5c516f2353c1fb5027ade834ba2f97f2e655ef2f4ee7889f4e3f740f2e73
194 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many of which point to a redirector infrastructure. The primary lure appears to be a "solutions manual" for organic chemistry, which directs users to the malicious URL https://ttraff.cc/pify?keyword=organic+chemistry+solutions+manual+pdf+klein. This suggests a phishing or scam attempt using a common lure to drive traffic to malicious sites.

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=organic+chemistry+solutions+manual+pdf+klein In PDF document text
    • http://files.keithcochrane.com/uploads/1/3/1/1/131163904/9866182.pdfIn PDF document text
    • http://files.surreyhillsmusicfestival.com/uploads/1/3/0/7/130738758/d3fa4.pdfIn PDF document text
    • http://files.mplusfphotography.com/uploads/1/3/1/3/131384568/b31586cf6f3.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/1/0435/3651/5224/files/34418387044.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0629/4178/files/390203586.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1618/3205/files/kisijasexazivi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3730/2679/files/96618242900.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1104/7575/files/32044957974.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/naduz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5783/1326/files/fijimexaroxuwipiz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2385/9873/files/wirofevititulefosex.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2175/4787/files/jilepexitagazi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3199/4280/files/pasorubiworikozafunip.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9345/1159/files/tiwexalaz.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_off0000457a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x457A 5760 bytes
SHA-256: 7196e704ad27414b7a912b2c699093f796711233841997fe58a978c7776f9fe3
font_01_sfnt_off000058f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x58F9 9268 bytes
SHA-256: f3e5977adbe1ae2ec30ce6ed8b61448b8105496b78f5bdd88b83a7ce02074b04

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