Malicious PDF — malware analysis report

Static analysis result for SHA-256 f18dbc509c2abf1b…

MALICIOUS

PDF

49.0 KB Created: 2020-08-12 16:43:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: d333894b9bd4c752cb076cf3491df07e SHA-1: f2793fed0bb1cd519265df1285e8f5706026609c SHA-256: f18dbc509c2abf1baf0c34b7bf16e989439d314f3429a97f83578a306a525768
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.com/pify?keyword=helena+petrovna+blavatsky+books+pdf'. This indicates the document's primary purpose is to redirect users to a potentially harmful site. Additionally, a large number of external PDF links were found, suggesting a link farm or SEO poisoning attempt. The ML classifier also strongly flagged this PDF as malicious.

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=helena+petrovna+blavatsky+books+pdf In PDF document text
    • http://files.naobidetroit.org/uploads/1/3/0/7/130739628/tikameseje.pdfIn PDF document text
    • http://nubujubu.midwaybaptistnc.org/uploads/1/3/2/3/132303189/negogegopuma-duburijuxifur-piwadel-vekitege.pdfIn PDF document text
    • http://newaf.algonacwrestling.org/uploads/1/3/1/4/131454012/24279c89c80d0c.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/1/0431/3173/2132/files/xasapobigolunid.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7447/7464/files/tekuzefajojun.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0892/5600/files/maxofu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3141/3414/files/fasalenejibanoxujog.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/juxumadebamapetutorobegew.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0611/6511/files/57884304414.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5965/8398/files/mukebowuliruwogujez.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1097/3083/files/dagojupovunuwotonugalelu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/sovaratumu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2031/2991/files/wejatozi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0448/0807/7473/files/bericht_schreiben_4._klasse.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_off00007f56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F56 5360 bytes
SHA-256: 58d118aa64239ae5792f3984c247a65395a16ae9923208a69a4b8276585a4b3e
font_01_sfnt_off0000919a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x919A 10848 bytes
SHA-256: 283e2f41220856dc090173b815cbf0da6aeded951d385a3e5d9ade65142472f6

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