Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd98c4084ea79a31…

MALICIOUS

PDF

48.6 KB Created: 2020-08-23 01:33:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 6101e8ddd4b31ffbe4e891e1b07e4042 SHA-1: a8a3ee869dab9f87bedb32eabb3e3b85ec5fc295 SHA-256: bd98c4084ea79a31de353734a5ee9038132c8b4a913a474204a56db7c023664e
194 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. The document body, though partially corrupted, includes the same URL and a keyword suggesting a lure. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs, many hosted on 'cdn.shopify.com', likely to obscure the malicious redirector. 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/pify?keyword=spring+boot+thymeleaf+form+errors In PDF document text
    • http://files.dynacomltd.com/uploads/1/3/1/1/131164202/radijivaxerub.pdfIn PDF document text
    • http://files.khhcommunications.com/uploads/1/3/0/9/130969879/bixekomajivulo.pdfIn PDF document text
    • http://ruwupagas.ectocrank.com/uploads/1/3/1/1/131163599/turorilu-nebekilagaz-zeputoxu-gepoposade.pdfIn PDF document text
    • http://files.leavesformedicine.com/uploads/1/3/0/7/130740112/nabawi.pdfIn PDF document text
    • http://files.randlaycoltsjfc.co.uk/uploads/1/3/2/6/132683130/a93905.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/1/0431/8471/7979/files/how_to_make_as_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6700/5333/files/37389684691.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5618/4992/files/bestiario_cortazar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2520/3354/files/95937361069.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4225/8587/files/tifotufafevitekodulix.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7372/3800/files/mifodozifa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3839/9902/files/tigur.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0892/5600/files/ruxov.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0245/4428/files/suffixes_and_prefixes_list.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1352/8987/files/23974465054.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1721/3864/files/rirepalebenorujarobew.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1334/9273/files/polarity_of_bonds_and_molecules_worksheet_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3213/3278/files/81353666821.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
🗂 Part of campaign: khhcommunications.com 5 samples

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000064f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64F9 5660 bytes
SHA-256: 47895697347da886e97198e287a3dbe51ee997671fe2157c9fcff2ccb075d68e
font_01_sfnt_off0000780f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x780F 1800 bytes
SHA-256: a36eee06fef6ce219692c4ec918276ac99413e4fd1e3666e4031624f9289d620
font_02_sfnt_off0000809c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x809C 15968 bytes
SHA-256: 99d18e8d39830d31d7caeaf09f4ab4ef5fb5133c62731c931845399702729c3d