Malicious PDF — malware analysis report

Static analysis result for SHA-256 35ae1cd64c284b47…

MALICIOUS

PDF

45.1 KB Created: 2020-09-01 21:20:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 64b90da7f575ea8f3ef14c6704f42502 SHA-1: dbb6957e4ffb485659ccf46d4ecfb84d40618297 SHA-256: 35ae1cd64c284b47249526aecb4b4e51cf7541aa70e47f9ea0b30c06bd78ee22
202 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/wix?keyword=audio+recorder++mac'. It also exhibits a PDF link farm heuristic, with numerous links to benign-looking PDFs hosted on cdn.shopify.com and static.usrfiles.com, likely for SEO poisoning or to appear legitimate. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic suggests the document may be part of a multi-stage attack where a password is provided to decrypt a subsequent payload. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • SEO-redirector lure link (multi-word utm_term) low PDF_SEO_UTM_REDIRECTOR_LINK
    PDF contains a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the search-keyword gateway used by the 'free document download' phishing family. Surfaced as an IOC; on its own this is a low-confidence signal.
  • 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/wix?keyword=audio+recorder++mac In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static.usrfiles.com/ugd/e643da_7550a281625c43509d71695c574243f7.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/37428b_3b44f2113ee64d2ba968c4ed4e98fd94.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/1b8612_31f1c32181394216ad4bb36f72d7ee62.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8275/9836/files/classification_of_feedback_amplifiers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6271/4773/files/oxford_dictionary.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3346/8839/files/biblia_reina_valera_plenitud.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/2728/1558/files/54392187877.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/5266/8830/files/48168061067.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/6163/9318/files/voltage_regulator_working_principle.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9861/0589/files/jizekaxoduwus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0459/9899/7663/files/blank_birth_certificate_bd.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7208/5406/files/7283871174.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0715/6128/files/tolij.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/8583/9003/files/5353695432.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 2

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_off00005e9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E9B 4864 bytes
SHA-256: 1f4ccad70f8314667e8306d59bdc9898a58887d85e06c58e8b2f954b57a2dd8a
font_01_sfnt_off00006f08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F08 10128 bytes
SHA-256: f30c65d9d88b483f7d9786cbfd93eef1f926d35ccd8e1a13799e2ef48f0677d7
font_02_sfnt_off00009204.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9204 16232 bytes
SHA-256: 9a4cbfef1d361b49d4faaeef6ced77ef0fd92f26152dd8eab1109b0e9abbc1b2

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