Malicious PDF — malware analysis report

Static analysis result for SHA-256 52f177ba5f7a0c13…

MALICIOUS

PDF

36.4 KB Created: 2020-09-16 20:44:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 01f2cbe2f7de327072182f6181b6f957 SHA-1: c0c1fbdbe077dba90f102d7f30aafa596cf2ad7f SHA-256: 52f177ba5f7a0c131e7bfacd65d8c031ef8837469b4a77b242bd6268febf5f3e
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, including one to a known malicious redirector. The document body, though heavily obfuscated, contains text suggesting it is a search result for educational material, which is a common lure. The heuristic firings confirm the presence of malicious redirector links and a link farm, indicating an attempt to drive traffic to potentially harmful sites. 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.com/wix?keyword=prentice+hall+literature+grade+8+teacher%2527s+edition+pdf In PDF document text
    • http://files.inspiredfoodforlife.com.au/uploads/1/3/1/4/131453054/numigesopokibiw.pdfIn PDF document text
    • http://pizijutit.blytntministries.org/uploads/1/3/2/7/132710677/cdbbc5b2718.pdfIn PDF document text
    • http://files.guidesforjohnofgod.com/uploads/1/3/1/4/131437983/6762822.pdfIn PDF document text
    • http://files.evbuilders.co.nz/uploads/1/3/1/4/131406348/6844621.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://faaae760-d238-46d1-bf01-67f78201d10a.filesusr.com/ugd/49f5ef_8ce7f4333682408684169d342f00d8e3.pdf?index=trueIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7274/8710/files/canis_lupus_baileyi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2699/7663/files/pinoy_tv_replay_online.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/8995/8814/files/70506195086.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0357/6481/files/71837050014.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6380/3046/files/fejupijagejodibekikefevo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6704/0154/files/kuwokinutitefovorumekog.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 4

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_off0000414f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x414F 5528 bytes
SHA-256: 7f57ae78924b634ea5d1329aeba4fe9a3caee76fdb74cbcf33bdecaf82303433
font_01_sfnt_off00005409.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5409 10040 bytes
SHA-256: 0cae2291a0b104e418c1bfc64048d90484874bdb12220d2311820433eb67037e
font_02_sfnt_off00007667.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7667 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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