Malicious PDF — malware analysis report

Static analysis result for SHA-256 806b51b884fac537…

MALICIOUS

PDF

42.6 KB Created: 2020-08-14 10:44:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 175c7508242db65c730499a09e231b28 SHA-1: 44d933cb6e3433a31934b00a9a89543ab004b020 SHA-256: 806b51b884fac537bc5d025b37365bd45ba0bd0ae1d1badef989ce6773f9f35b
194 Risk Score

Malware Insights

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

The PDF contains embedded links and text that direct users to a malicious redirector URL, identified as 'https://ttraff.ru/pify?keyword=nims+is+100+test+answers'. This URL is flagged as a known malicious redirector and part of an SEO link farm, suggesting a phishing or malware distribution scheme. 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.ru/pify?keyword=nims+is+100+test+answers In PDF document text
    • http://xeren.roaring20s.blog/uploads/1/3/0/8/130813528/f1c08cf02056.pdfIn PDF document text
    • http://files.letmebegreatchildrensyoga.com/uploads/1/3/1/3/131380295/luvipaxikudi.pdfIn PDF document text
    • http://xotezosa.sauveriegel.com/uploads/1/3/2/8/132814930/pasalowavulikum-tidunaga-ludobewugajov-pemofojexaze.pdfIn PDF document text
    • http://tometu.fcstnebraska.com/uploads/1/3/1/1/131164250/904894.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/1/0432/5687/3128/files/8652622529.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/37144816260.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4343/8244/files/cours_d_algorithme_et_exercices_corrigs.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0012/6880/files/xidaloxeme.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2029/5064/files/charlotte_s_web_script.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8947/8307/files/vatijejitutuwe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9308/2783/files/mitaba.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0444/6345/6423/files/convertidor_analgico_digital.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6662/9032/files/gomefovip.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9776/0668/files/guxis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6372/1637/files/74188937085.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 4

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_off00006a31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A31 5052 bytes
SHA-256: 173af71421b0915aed6b8775a95950d2e238a00afa8091acd525dd9ac5038fa9
font_01_sfnt_off00007b5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B5D 10204 bytes
SHA-256: f797b7665a60f2463b42f363c974a306b62edddf3ef3b7a28a404a49a65b3ca7

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