Malicious PDF — malware analysis report

Static analysis result for SHA-256 abf9aac8d1c23b5f…

MALICIOUS

PDF

72.5 KB Created: 2020-11-24 05:36:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 0d98af2f3ecc016cc0fc1122bedab927 SHA-1: e5519531d1d8340b2cd47892809322e125300621 SHA-256: abf9aac8d1c23b5f1a17b17698b417a25bb99bd0f77204c4375812a3844ff505
254 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains multiple links to redirector infrastructure, specifically pointing to 'cctraff.ru', which is flagged as malicious. The document body, though heavily obfuscated, contains text related to downloading software, aligning with the phishing lure identified by heuristics. The presence of numerous external PDF links suggests a link farm or SEO poisoning attempt to drive traffic to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://cctraff.ru/strik?utm_term=descargar+paint+tool+sai In PDF document text
    • https://gerexogevi.weebly.com/uploads/1/3/4/4/134463414/gupigolas.pdfIn PDF document text
    • https://nuzixusimupe.weebly.com/uploads/1/3/4/3/134306281/310167.pdfIn PDF document text
    • https://temazojirilezin.weebly.com/uploads/1/3/2/3/132302863/gavuki_xobewejilaz_rifapi.pdfIn PDF document text
    • https://dewufixibofapez.weebly.com/uploads/1/3/4/5/134596153/a0507e.pdfIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/gagagakigibapo/vipovuxisoropelegarazu.pdfIn PDF document text
    • https://s3.amazonaws.com/wumodukubaru/71663293028.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca78004c-4ca6-48d8-93ec-09ce5f9a40db/skyrim_hud_ausblenden.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/282b38a5-6097-46c0-99ef-6bd1dfec3b96/78301418604.pdfIn PDF document text
    • https://s3.amazonaws.com/rakabexozu/catalogue_oriflame_juin_2019_maroc.pdfIn PDF document text
    • https://s3.amazonaws.com/xonaxevetaf/rasozajulekiruvezuxob.pdfIn PDF document text
    • https://s3.amazonaws.com/wekibik/pinigitusepibepeda.pdfIn PDF document text
    • https://s3.amazonaws.com/kevava/muref.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://www.gnu.org/licenses/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000d461.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xD461 9488 bytes
SHA-256: 3280ba0a5862d4563b05b6630ed47cef86ac9d67cf0370470c2ce3248335ea80
font_00_sfnt_off0000c2f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC2F8 5100 bytes
SHA-256: 1d1e6b46d1e885c5c667b3a8fac9ab47d2c5bada9b238b2bb652036e48401de9
font_02_sfnt_off0000eee8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEE8 11300 bytes
SHA-256: 19afae5ea65a93f476c910af46bb9cd94f8da2d28cc84b149eb14cd553048dfc

Open this report in the interactive analyzer, or submit your own file for analysis.