Malicious PDF — malware analysis report

Static analysis result for SHA-256 d015528270cd585a…

MALICIOUS

PDF

45.7 KB Created: 2020-10-26 12:20:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 6d17e9a430a6e54225ed6762fa2e69f2 SHA-1: 891634c175f233bc9fcc0a548c26c69730ec685b SHA-256: d015528270cd585a4df7da90adbd77148a8578e61ca7be66f0b25a60c53a5001
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links that redirect to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK and PDF_SEO_LINK_FARM heuristics. The primary malicious URL identified is https://ttraff.me/123?keyword=les+pronoms+demonstratifs+pdf, which is likely used for phishing or to serve a second-stage payload. The document body, though heavily obfuscated, also contains this URL, reinforcing its role in the attack.

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.me/123?keyword=les+pronoms+demonstratifs+pdf In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/74709586439.pdfIn PDF document text
    • https://s3.amazonaws.com/davubewu/jirinukixamave.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/wevitogajowawapuj.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/155639325.pdfIn PDF document text
    • https://s3.amazonaws.com/rowubunak/fasivasimugomofararut.pdfIn PDF document text
    • https://s3.amazonaws.com/fujadabez/capacitor_letter_codes_table.pdfIn PDF document text
    • https://s3.amazonaws.com/memul/59674537067.pdfIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/lexifogogisowolotiputo.pdfIn PDF document text
    • https://s3.amazonaws.com/dinigugaxej/verbal_analogy_practice_test.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/441e5241-ff2a-4087-9191-16d728adfd85/subaru_pressure_washer_ea190v_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/956130a6-40bf-45e9-9ff1-1b59e130b106/48042531508.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b4ece785-0697-4ac4-a2e7-3dc4eea43fec/vinanudujef.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/94cfeff0-03ea-4631-8d6e-eb47835201ee/nazikutodewujopitaxixalup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3b853dd-e001-4257-b8a9-249bfcbc0f3d/52134926811.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6159faa-a22a-4ad0-a764-e0b97d57de4d/paresezatif.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/39daf9a5-04e8-4b16-8312-9492bd4ead9a/44615622218.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9732/5732/files/vilulomamitupotelolep.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/1423/2485/files/menschen_a2_kursbuch_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0505/7619/5752/files/application_loader_guide_apple.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0492/4565/1100/files/rimogulalamimomijel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/3210/7937/files/zikivumupide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/0990/0183/files/observations_and_inferences_1_worksheet.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007039.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7039 5096 bytes
SHA-256: 0df352c783a9a2d90d83f008a9868e80ef98098f366642513be74534c31baa4e
font_01_sfnt_off00008179.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8179 12024 bytes
SHA-256: a301ec9ed110507fc4d61275ee25566cd80949fb54bfa7e5778948a194433411