Malicious PDF — malware analysis report

Static analysis result for SHA-256 181120e56927c590…

MALICIOUS

PDF

43.3 KB Created: 2020-08-12 01:13:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 3db267267e765841d6fbc36896887236 SHA-1: d4661d031c457b89d46909ddf0e20a5cc21b08ba SHA-256: 181120e56927c59051da94ce9de3f2d5396e402d4f08b8ae10f506befd06141c
194 Risk Score

Malware Insights

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

The PDF contains multiple heuristics indicating malicious redirector links and a link farm, pointing to suspicious infrastructure like traff.com. The embedded document body, though heavily obfuscated, contains a URL that is also flagged as a malicious redirector. This suggests the document's primary purpose is to redirect users to a potentially harmful site, likely for phishing or to download further 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=patologi+klinis+pdf In PDF document text
    • http://files.justbeingkaileyjo.com/uploads/1/3/1/4/131437669/098168666be.pdfIn PDF document text
    • http://files.barrocahorsetrials.com/uploads/1/3/1/3/131383544/9449567.pdfIn PDF document text
    • http://files.gogovernors.com/uploads/1/3/1/4/131406762/6528224.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/1/0433/6032/1691/files/xuvalufesop.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5553/8595/files/basic_pharmacology_for_nurses_16th_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2113/9096/files/beyond_compare_comparison.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8649/5396/files/proform_730cs_treadmill.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/7941/6473/files/4._3_mercruiser_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8750/4294/files/rerepufalukuwaxe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1104/7575/files/garden_of_words_english_dub_kissanime.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2255/7082/files/jabivuwaropato.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2603/9452/files/22458050770.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0664/7717/files/48920861857.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0092/2261/files/tiviw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8523/4338/files/child_name_list_in_hindu_boy.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_off00006ce4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CE4 5180 bytes
SHA-256: ef5cf7956adcc797c5b12a0b77c0bc9ebbaf503a54904a9c97edbba3927b4017
font_01_sfnt_off00007e95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E95 9860 bytes
SHA-256: d558433cfa8e4ec13d37960e1fce409c351f6f45d1ffe916cf54caceea818f45

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