Malicious PDF — malware analysis report

Static analysis result for SHA-256 77a68cc6662f207e…

MALICIOUS

PDF

42.3 KB Created: 2020-08-12 14:23:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 31c2c892716fc222870eec12dae9a058 SHA-1: d0e40526c8a15cf63b135267150be5368ca1e3c7 SHA-256: 77a68cc6662f207ee7d9a1a147b0a191b2a6ffee2a77e5fc1ef7b89756cff022
194 Risk Score

Malware Insights

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

The PDF contains a large number of links to external resources, many of which point to a redirector service (ttraff.com). The document body, though heavily obfuscated, contains URLs that appear to be part of an SEO link farm designed to drive traffic to malicious or phishing sites. 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.com/pify?keyword=addition+worksheets+for+1st+grade+pdf In PDF document text
    • http://files.westcentralcamp.com/uploads/1/3/0/8/130874535/3934753.pdfIn PDF document text
    • http://files.krvbrugg.ch/uploads/1/3/1/3/131382274/revukewewaf.pdfIn PDF document text
    • http://buvetaji.kansascityamprepair.com/uploads/1/3/1/4/131453501/bizupexebupafususef.pdfIn PDF document text
    • http://files.itsmorethanjustasport.com/uploads/1/3/2/8/132815791/vavotul.pdfIn PDF document text
    • http://files.summasportswear.com/uploads/1/3/1/4/131453807/118d8e22a22790b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2378/5370/files/adding_polynomials_worksheets.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6482/8838/files/19859679841.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0832/7829/files/vexuxiwiwikoguruvuxuje.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8532/3683/files/39192086884.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1384/0793/files/19760365732.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3882/5887/files/74453548987.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0805/6740/files/30986797705.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4932/0610/files/89060884331.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/3137/8590/files/management_aptitude_test_sample_papers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4140/7644/files/palowelaga.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7332/2664/files/3x3_oll_and_pll.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000059c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x59C3 5256 bytes
SHA-256: 2af63a1ad97a0961e5aac6e76546b69fe40eb4f6007127ac9888ebcd90b96b32
font_01_sfnt_off00006bb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BB6 10048 bytes
SHA-256: 986be0a1836e17c39853ef544771ac7b72623229e641bbfe71f0818498ef533a
font_02_sfnt_off00008e33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E33 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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