Malicious PDF — malware analysis report

Static analysis result for SHA-256 d78886cae04c2918…

MALICIOUS

PDF

39.6 KB Created: 2020-08-06 19:46:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 0478aa906217800dbc1b656891b1a617 SHA-1: 052b1787c82a1d9e7aae05ce74f76d012c28fa59 SHA-256: d78886cae04c291832e53d611aa3fa509b708e5838fd5d66a40e39420cb748f2
194 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with a critical heuristic identifying a link to known malicious redirector infrastructure at ttraff.ru. The document body, though heavily obfuscated, contains URLs that are likely part of this redirection scheme. The primary intent appears to be directing users to malicious sites, potentially for phishing or malware delivery.

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.ru/pify?keyword=elevation+worship+piano+sheet+music+pdf In PDF document text
    • http://files.aican.ca/uploads/1/3/1/0/131070317/vulukewogasivus.pdfIn PDF document text
    • http://files.atlanticirishfest.com/uploads/1/3/1/8/131871556/1301783.pdfIn PDF document text
    • http://files.soltiling.com/uploads/1/3/2/6/132681409/dixafusodemes-norudakideragi-nuzamewunazil-sojipogimuw.pdfIn PDF document text
    • http://files.birthbeforeandafter.com/uploads/1/3/1/1/131164442/9808467.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/1/0428/9835/8432/files/mofofuledezenededur.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/setixinojed.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2651/4077/files/pozaruv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4582/1333/files/fegowitokawanoda.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4784/5030/files/list_of_acids_bases_and_salts.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5840/5275/files/netago.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6888/3098/files/43743395956.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/3947/2288/files/kisapitobosumagum.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/depusulolunifanilux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9805/3539/files/28872298195.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4327/4395/files/xifaleritadimulujipu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3628/6877/files/92862465112.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5064/7202/files/carrera_armamentista_guerra_fria.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2352/4259/files/76884880856.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8982/0836/files/web_search_engine_research.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004d31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4D31 5384 bytes
SHA-256: 6807b249b3db65dfd552137cd3651974de1f2584ec52f3545958301bb79d626a
font_01_sfnt_off00005f66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F66 9912 bytes
SHA-256: 42b378b623da5bd09c7c1166d420c15dd8000200f99cf6a0b7d1b7114800c357
font_02_sfnt_off0000815f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x815F 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c