Malicious PDF — malware analysis report

Static analysis result for SHA-256 102163efe4b60180…

MALICIOUS

PDF

40.5 KB Created: 2020-08-05 11:08:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 3a2da31d24ac1eda2854a62802a65807 SHA-1: 394ee9291a84448890e6183d86990051b0df21c7 SHA-256: 102163efe4b601806669d9473a078a69109afe7971eb02675ae9001275e94791
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to a redirector service (ttraff.ru) which is flagged as malicious. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external PDF links, suggesting an attempt to manipulate search engine results for malicious purposes. The ML classifier strongly supports the malicious verdict. The embedded URLs and the nature of the heuristics indicate a phishing or malware distribution lure.

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=english+aptitude+test+questions+and+answers+pdf In PDF document text
    • http://files.nativetales.com/uploads/1/3/0/7/130775942/b90bae542e.pdfIn PDF document text
    • http://files.vbgprofessionals.com/uploads/1/3/1/3/131398419/lilugolemukixig.pdfIn PDF document text
    • http://suteli.knowlebadminton.com/uploads/1/3/0/8/130814017/lojezesurolinalukil.pdfIn PDF document text
    • http://files.hecmaconference.org/uploads/1/3/0/7/130776795/9765255.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/1/0427/9956/2911/files/vekigawavawo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4614/1093/files/c_pointers_tutorial.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1386/4604/files/dixas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4823/0297/files/motorola_sbg6580_login.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7542/7740/files/wireless-_n_wifi_repeater_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5759/4016/files/zutixojukixibidewuxa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zamujogeve.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7878/6965/files/70915460763.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1570/7551/files/67704229039.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5507/7781/files/macx_video_converter_pro.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1700/2405/files/skyrim_vs_skyrim_special_edition_mods.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1899/3307/files/susugizovarobusokatoz.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_off00005f4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F4A 5476 bytes
SHA-256: 1c91400f36fc32b1a173286f5fdd0f0b162652d77acc1f990b83af80043a13c8
font_01_sfnt_off000071f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71F7 10164 bytes
SHA-256: b0d46ef36637d1f4de4208374e99e919ae7eda971f27289b0928da2e974db779

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