Malicious PDF — malware analysis report

Static analysis result for SHA-256 a55e1c525f09c9fa…

MALICIOUS

PDF

50.8 KB Created: 2020-08-15 01:37:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 52737944c16f590466912727b79ef446 SHA-1: bfd1ba1b4d6373fc9a174547a951849e3f56e454 SHA-256: a55e1c525f09c9fa5cc6ecd88f506d47ecfed0835f1bd05b0ee3306484afdf76
194 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with one specifically pointing to a known malicious redirector at 'ttraff.ru'. This suggests a phishing or social engineering attempt to redirect the user to malicious content. The document body, though heavily obfuscated, contains URLs that are also present in the embedded link list, reinforcing the redirection attempt. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

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/wb?keyword=angular%20cli%20cheat%20sheet%20pdf In PDF document text
    • http://jesazijam.molecularbliss.com/uploads/1/3/1/4/131453501/xawilajafij_nibulofebuxade_gedegujudug_sogisesu.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/1/0447/5063/5162/files/dennis_rainey_preparing_for_marriage.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8646/2628/files/nomidasusopuro.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/5076/0357/files/i_want_candy_2007.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/8141/4296/files/ps_plus_4life_space.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8987/9445/files/49808152266.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0809/0535/files/52931229187.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4651/0498/files/rujuvupidaguvedalolav.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0276/4184/files/9166066993.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3741/7891/files/endless_alleluia.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8529/1937/files/58320195912.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6731/8167/files/github_make_new_branch.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 1

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_off00006e0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E0C 5180 bytes
SHA-256: 1d51595fce01d6b9144a08388af812f2f70e6d57146c0e45063d943ae1923e8b
font_01_sfnt_off00007f9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F9B 14808 bytes
SHA-256: 0ab497317eed94440f9c21efa8d4a1716668ea1b1bc8ea3cbf4e651d6992a821
font_02_sfnt_off0000ae6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE6C 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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