Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca5dbf75cd0c164f…

MALICIOUS

PDF

40.3 KB Created: 2020-08-24 13:07:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 0d4d27cc4b9e6a159ecdbe9e15012dd8 SHA-1: 1532bd8476e4755685e966d3198e54e3c7cca0cc SHA-256: ca5dbf75cd0c164f2b6c331118be06a33aca607fddc498f0ae7546f943addfc1
194 Risk Score

Malware Insights

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

The PDF file contains multiple embedded URLs, with one specifically identified as a malicious redirector. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK confirms this, pointing to 'https://ttraff.cc/pify?keyword=ascii+art+generator++free+full+version'. This URL is presented as a lure for a free ASCII art generator, suggesting a phishing or malware distribution attempt. The presence of a large number of external links (PDF_SEO_LINK_FARM) further indicates a link farm or spamming activity. No scripts were extracted from this sample.

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=ascii+art+generator++free+full+version In PDF document text
    • http://files.wow.yez.dk/uploads/1/3/1/4/131438419/bd9025b47.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/1/0431/8153/9483/files/27027718164.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8804/4442/files/69286448863.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6763/7922/files/75502966772.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3505/7559/files/albumin_kit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6926/7354/files/peguxuvuzizazitubinakoz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0577/1939/files/91090104333.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2619/4336/files/matura.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8891/2290/files/simple_present_tense_worksheet_grade_1.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4414/3253/files/zetuxisokizupaluworutota.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6374/6465/files/pifujakimajinivat.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5331/8298/files/forozidudimidagidipi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0046/2503/files/zukudilolugizax.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 3

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_off00005f39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F39 5100 bytes
SHA-256: 656015b41089b782364fad020ff9ecf674bb2daff7d7f202621cc21dbd74da19
font_01_sfnt_off000070a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70A6 10460 bytes
SHA-256: 5d1cc13be718252400575e4469dd73a2682c7a016f2bef1327a6d1b9ba56debb

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