Malicious PDF — malware analysis report

Static analysis result for SHA-256 a839f77181990590…

MALICIOUS

PDF

43.2 KB Created: 2020-08-02 12:52:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 17d20de8bcb3df62e9cf12a71f235a5f SHA-1: 3b080d46df19f9d64af2f6d51588d326deb7f90b SHA-256: a839f77181990590377c38c84d314b4dcfb6e59c8ea897aa40618022a3c5282e
202 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=www+mitelcel+com'. Additionally, it exhibits characteristics of a PDF link farm, with numerous external links, many hosted on Shopify. The document body, though heavily obfuscated, contains the same URL, reinforcing the lure. The SE_INVOICE_LURE heuristic suggests a pretext of payment or invoice, intended to trick the user into clicking the malicious link.

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.
  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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=www+mitelcel+com In PDF document text
    • http://files.fishersenglishfun4all.com/uploads/1/3/0/9/130969939/boxifolopa.pdfIn PDF document text
    • http://files.natalie-coppola.com/uploads/1/3/0/9/130969440/6e28f16e83e0e4.pdfIn PDF document text
    • http://files.irmacalabrese.com/uploads/1/3/1/4/131453698/zesupar_wezukekekir_lunefujemikibag.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/1/0428/1679/8883/files/13967377421.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4929/5770/files/fogevoxava.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7684/5728/files/65724696763.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7373/9675/files/3797354234.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2503/8497/files/77625705350.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5936/3488/files/nomarasubirisobimizebu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1142/3902/files/17747558517.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6554/8708/files/43527873587.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3903/8360/files/58778817912.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0073/3596/files/fajatotarebenabavuwideget.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8489/0790/files/37583213407.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6759/6184/files/29620676436.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9277/8912/files/loxexanagep.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 2

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_off0000619d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x619D 4568 bytes
SHA-256: 59ef52b433fb1eff88bb9ded6842f417682b901409f8c8998892c0f78ec7d5b3
font_01_sfnt_off00007132.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7132 15136 bytes
SHA-256: b8fdea1975b01decb586b12666cdb795c3223f5492ab67c3a1ebc52104e6634a

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