Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c11bcfd28b0bd3e…

MALICIOUS

PDF

45.1 KB Created: 2020-08-20 08:44:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: f7da45ad2d93ad5a9d1e6babb415cff5 SHA-1: c6f88d48814e1e5732e4bbf3f981d5f5aea22d61 SHA-256: 8c11bcfd28b0bd3e10db55315d8227b7fefc0f16adf79258054025d075df9431
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, many of which point to domains associated with link farms and redirectors, such as 'ttraff.com'. The document body, though heavily obfuscated, contains text related to website templates and the URL 'https://ttraff.com/pify?keyword=website+templates+free++css', indicating a lure to potentially malicious content. The ML classifier strongly supports the malicious verdict.

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=website+templates+free++css In PDF document text
    • http://pudulezuj.graphiclibrary.org/uploads/1/3/1/4/131437318/mevujodufilew_sefevuno_bosubunulun.pdfIn PDF document text
    • http://files.sexyandhealthyshop.com/uploads/1/3/1/4/131453302/668df70f63.pdfIn PDF document text
    • http://files.p186x.net/uploads/1/3/0/8/130873741/5707402.pdfIn PDF document text
    • http://nefunej.greaterhudson.org/uploads/1/3/0/7/130776485/48c6b98586fe3.pdfIn PDF document text
    • http://files.abiblo.com/uploads/1/3/1/3/131383467/dc566.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/1/0435/4480/5525/files/28311972474.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/7020/8662/files/69178663982.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4516/5976/files/tamil_rowdy_baby_video_songs.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2308/1378/files/sonovonabolidiw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1411/1903/files/57981602640.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0009/4112/files/kartilya_ng_katipunan_ni_emilio_jacinto.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2440/6935/files/5e_barbarian_zealot_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9050/2042/files/89148165339.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5967/5293/files/plant_cell_lab_onion_and_elodea_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2730/7416/files/botaderaf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6730/2295/files/cable_cowboy_john_malone.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1573/2376/files/92034507002.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8996/0865/files/tudigupemu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9982/4032/files/9238210735.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_off00006888.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6888 5312 bytes
SHA-256: 363204a830290ec7e50c332706d4493c930b3fa85985b278f46e674adbcada05
font_01_sfnt_off00007a7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A7D 2268 bytes
SHA-256: 7f38c7bd3076d5ec567b373f8788658f617417f44aeaffad1c2d563936ecbb0a
font_02_sfnt_off0000848d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x848D 10132 bytes
SHA-256: 90165f003d60aa4c6e78a63a975f5c7791d7f9b79ff8d5ebdc90a96b1c0e734e