Malicious PDF — malware analysis report

Static analysis result for SHA-256 4cbf1ea5c5a861b6…

MALICIOUS

PDF

36.2 KB Created: 2020-08-17 11:16:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ed4d9d45aa28b0182569272f59dd0e5f SHA-1: 551e9737ee1d40f5475dba5f192d4708c9343832 SHA-256: 4cbf1ea5c5a861b6043af234037426f969a051d9c71a4447e5b63cc2559800da
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with a critical heuristic firing for a malicious redirector. The document body and embedded links suggest a lure related to 'Soundcloud playlist er mac', likely a phishing or scam attempt. The primary malicious IOC is the redirector URL, which is designed to funnel traffic to further malicious sites.

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.com/pify?keyword=soundcloud+playlist+er+mac In PDF document text
    • http://jizevijo.taylorrao.com/uploads/1/3/2/6/132681361/jumipojab_vobenirodubu_jajedidumabimu_dufigusesob.pdfIn PDF document text
    • http://files.agentfortruth.com/uploads/1/3/0/9/130969791/e744907129.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/1/0431/6413/9674/files/viluke.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8627/4977/files/69244325305.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5738/0514/files/briggs_and_stratton_2hp_engine_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7940/1634/files/dafeborurin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5544/7201/files/free_sectional_charts.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1826/3464/files/xabofimekabadikoxotal.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2944/5273/files/rixokuvikowa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0671/3253/files/pirutadujiserazi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5494/0828/files/xokovixukuzefotabarupewu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5265/5002/files/tiwefebati.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_off00004f05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4F05 5424 bytes
SHA-256: ec2e750286c05878c58534899237c964971508b1cd72dd822b058dc2aa8c39a2
font_01_sfnt_off00006160.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6160 10220 bytes
SHA-256: bf74b8b4ea84e5e75886945d66b29073e057c9ffe0e78c0a8542ec579bd05044

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