Malicious PDF — malware analysis report

Static analysis result for SHA-256 a40eb2690109ebd7…

MALICIOUS

PDF

40.2 KB Created: 2020-08-06 04:14:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 5835d281558eff0d2b6630ce12ed85c7 SHA-1: f22cadfc06b46817525d183303fe73d3fd8beb31 SHA-256: a40eb2690109ebd7c19a971161148d4982ca1832eec388dac2d65ca9fd1c5bf1
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a link farm designed to lure users into clicking on what appears to be a technical report. The primary link, 'https://ttraff.ru/pify?keyword=technical+report+writing+book+pdf', is identified as a malicious redirector. The document body, though heavily obfuscated, contains references to the lure and the malicious URL, indicating a social engineering attempt to redirect users to potentially harmful 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.ru/pify?keyword=technical+report+writing+book+pdf In PDF document text
    • http://files.807boutique.com/uploads/1/3/1/4/131407469/midujamedipumif.pdfIn PDF document text
    • http://delip.derekkalp.com/uploads/1/3/0/8/130874317/502f768cf.pdfIn PDF document text
    • http://files.amandaghahremani.com/uploads/1/3/0/7/130776558/fixux.pdfIn PDF document text
    • http://files.thehoneybeefactory.net/uploads/1/3/1/3/131379590/62cee55a35e09d.pdfIn PDF document text
    • http://files.phoenixlashlounge.ca/uploads/1/3/1/8/131856290/tezufivuzitasug.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/1/0435/8524/1245/files/fowufa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5747/0872/files/6294114891.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5725/9420/files/84867541218.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5252/3929/files/finorun.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6601/5400/files/ratatouille_full_movie_online_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0448/4985/6669/files/curso_de_ingles_basico_gratis_para_principiantes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1685/5457/files/gofubiditufatebadu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0158/5570/files/53276229746.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/72707516801.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gidawibozifuniji.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6856/3355/files/35361589818.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
🗂 Part of campaign: derekkalp.com 3 samples

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_off00005f58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F58 5484 bytes
SHA-256: 49d5bd71770e3f9c7659077d8220e448b32fe7b169903fee584fc4aa6f451c44
font_01_sfnt_off00007209.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7209 9980 bytes
SHA-256: 6ebfe69933aea65e97d3755bed6ea1012f3b3972394c183c73e10aa847911d41

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