Malicious PDF — malware analysis report

Static analysis result for SHA-256 57d70d0e53c91fc0…

MALICIOUS

PDF

48.1 KB Created: 2020-08-20 01:47:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a36d8712ba2629e7b6f73b82c2dee99c SHA-1: 2e428ca64ab5eec53bcd4b0f4a83229d2a890152 SHA-256: 57d70d0e53c91fc07f02e2c3a7dc7037959b7326c4d611d2c6b53a3da6bf14c6
194 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, specifically pointing to 'https://ttraff.cc/pify?keyword=distressor+uad+manual'. This indicates an attempt to direct users to malicious infrastructure. Additionally, a PDF link farm heuristic was triggered, suggesting the document is part of a larger effort to distribute links. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of the malicious redirector URL is sufficient to infer a phishing or redirection attack pattern.

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.cc/pify?keyword=distressor+uad+manual In PDF document text
    • http://files.marinaredlich.com/uploads/1/3/0/9/130969598/fc2135835.pdfIn PDF document text
    • http://files.sarahwlaiola.com/uploads/1/3/0/8/130815213/b3016ffc924.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/1/0431/6725/2641/files/29586397440.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6314/8706/files/neural_networks_and_deep_learning.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0761/4882/files/73149038321.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/5923/1385/files/mindray_pm_60_pulse_oximeter.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1171/8820/files/83455253933.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0364/0999/files/53103140461.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5170/3706/files/vajowimejiwakikujapewonew.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5114/7679/files/megitonagorukutumogikar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8589/7627/files/38154887778.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1992/6679/files/french_to_english_sentences.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6886/7231/files/athlean_xero_download.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006858.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6858 4852 bytes
SHA-256: be3bd9bf388564d157501113b5611b6b038f5c30ae59f7051c80f8994f3eff20
font_01_sfnt_off000078b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78B6 14240 bytes
SHA-256: 13f7ac137474c3443d93656261f5f310c2c9df22016bca1e6b950b120608af98
font_02_sfnt_off0000a52f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA52F 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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