Malicious PDF — malware analysis report

Static analysis result for SHA-256 e55b392a6507fa0c…

MALICIOUS

PDF

54.4 KB Created: 2020-07-31 00:50:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b877737141e09723bbb0bf076a802965 SHA-1: c9bb10f03707da08a39397d92b0ecd68f1cf9445 SHA-256: e55b392a6507fa0c4a6d65524bac0484edf33a43b10825c4069ff59bcef3d5ba
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file exhibits characteristics of a link farm, with numerous embedded URLs. One critical heuristic identifies a link to known malicious redirector infrastructure (ttraff.ru). The document body, though heavily obfuscated, contains text related to 'City of Thieves' and 'wkhtmltopdf', suggesting a lure. The primary attack pattern involves redirecting users through malicious links, potentially leading to phishing or malware downloads.

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=city+of+thieves+david+benioff+pdf In PDF document text
    • http://files.dcigym.com/uploads/1/3/1/3/131379439/liladebafit.pdfIn PDF document text
    • http://files.olddonationband.com/uploads/1/3/2/6/132681339/kojanok-rimixekogesu-wedefepugora.pdfIn PDF document text
    • http://files.goldenspiraldesigns.com/uploads/1/3/0/9/130968962/333465f9db33d.pdfIn PDF document text
    • http://files.hallgroupchemistry.com/uploads/1/3/1/8/131856627/giruruxadoti.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/1/0435/5335/7985/files/kesosusaxi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/2948/4952/files/54661817597.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3050/3843/files/jiwuxujuwatewezasanovifat.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0097/7829/files/46200906898.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7279/0427/files/30691831789.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4126/8647/files/werudevijobifogifefoj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6656/4520/files/95734573326.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7824/5781/files/92449569463.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tawoxusabevesumaxev.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4293/9814/files/52710296449.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5675/1002/files/pigawevowafigapa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5269/4680/files/56097550313.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_off00009746.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9746 5112 bytes
SHA-256: 5fead089b9f841d1a6d357adf203415a35677e19cc18592aa412d007e7a3ab88
font_01_sfnt_off0000a8b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA8B0 10372 bytes
SHA-256: 4ee1efba3841eb1adb13bb0835e492012530bbff72f343c67a8ed78ba0c1c912

Open this report in the interactive analyzer, or submit your own file for analysis.