Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2f77199acbc90a6…

MALICIOUS

PDF

48.0 KB Created: 2020-08-12 06:06:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: bb1c8a8b4c62ba9172522f7498ed2809 SHA-1: 52ea9c17c082cf8b3273383f5290d45a42f4087a SHA-256: b2f77199acbc90a61a3e4cc80cb419fdf01274da9278ece28ed289261cbe20d8
202 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1200 Hardware Add-in T1059.001 PowerShell

The PDF file exhibits characteristics of a link farm, with numerous embedded URLs pointing to external resources. One critical heuristic identifies a link to known malicious redirector infrastructure at 'https://ttraff.cc/pify?keyword=creative+brief+form+pdf'. While the document body contains text related to a creative brief, the primary malicious function appears to be the mass distribution of links, likely to lure users to malicious sites. No scripts were extracted, limiting the analysis of direct payload execution.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=creative+brief+form+pdf In PDF document text
    • http://files.horsetoheart.net/uploads/1/3/1/4/131406843/47949.pdfIn PDF document text
    • http://files.nokillhuntsville.com/uploads/1/3/1/4/131437725/5780307.pdfIn PDF document text
    • http://files.kfxfarms.com/uploads/1/3/1/3/131379443/womaka_lebapenojeni_kovulirelobe.pdfIn PDF document text
    • http://jakolaxup.charlielavaroni.com/uploads/1/3/0/8/130813592/gibak.pdfIn PDF document text
    • http://toraneno.wandlevalleyforum.org/uploads/1/3/1/6/131636948/risudofidakemu_nururelugar_gugoxufozub_fikimefapem.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/1/0430/9857/0909/files/42043094464.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6470/4662/files/16843148947.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2951/0814/files/xekarinutukulebexupetig.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7367/4142/files/93679418835.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6713/7438/files/68421808462.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9212/3560/files/ap_computer_science_practice_test.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6251/0236/files/33586813501.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8561/7566/files/xejuk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/dewefezagabujam.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6289/3471/files/sewilejikawumapasijilud.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0451/8245/1861/files/advertisement_design.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7283/8039/files/acuerdos_de_convivencia_en_el_aula.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_off000070cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70CB 4880 bytes
SHA-256: fdcd6c0e40946d48918fb9824407c13f2e1b91c585577ffe456a1af4e2870bfb
font_01_sfnt_off0000816a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x816A 10500 bytes
SHA-256: be84a77190cc8c6797963dda2553d872a8fcb651290220ecf753a79275de1f13
font_02_sfnt_off0000a522.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA522 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3