Malicious PDF — malware analysis report

Static analysis result for SHA-256 8cfa518a7cd7f232…

MALICIOUS

PDF

42.8 KB Created: 2020-08-27 17:53:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: bf5e43239b12f29c3c0affe3834cf79c SHA-1: 2ab04f9e41e0690224a58f195690432d060cb7fc SHA-256: 8cfa518a7cd7f2320de8208e4f08a7d5d85b1580f76f0f650707bb4ecdfa1bd1
254 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with a critical heuristic identifying a redirector link to 'ttraff.cc'. This, combined with a high number of PDF links and a machine learning classifier flagging the document as malicious, strongly suggests a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains the same redirector URL, reinforcing its malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 7

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
  • 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=how+to+delete+insta+account In PDF document text
    • http://xivovum.triplecrownlacrosse.com/uploads/1/3/1/4/131453558/detax.pdfIn PDF document text
    • http://badul.eatingnosetotail.com/uploads/1/3/1/4/131482975/c8c28899.pdfIn PDF document text
    • http://files.texashollandlops.com/uploads/1/3/1/3/131379371/7953459.pdfIn PDF document text
    • http://files.twistedtangerine.com/uploads/1/3/2/6/132682295/a23c91fe5c23.pdfIn PDF document text
    • http://nomupezaj.forzegym.com/uploads/1/3/0/8/130874431/liwipozugedawe_levakijaxokuzo_nurisezabepopew_waginise.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/1/0431/7144/6939/files/17637335566.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7790/2234/files/flexner_report_summary.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8253/8403/files/darazuvepomulobuxinip.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4708/3429/files/cancer_de_cervix_sintomas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3842/5766/files/tremendos_galileos_discografia.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7386/3842/files/fegaxilelotuturid.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3888/3485/files/regulatory_reporting_job_singapore.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5331/7272/files/arcview_gis_3._2_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0457/0352/8604/files/11157716444.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_off00006a2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A2A 4892 bytes
SHA-256: 2679fc22d4d5fad77b312b5fc7f287e60050482124936fdbbf47fa5aabc5a4fb
font_01_sfnt_off00007aee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7AEE 10232 bytes
SHA-256: 048dc6ba3039626782962cd1205b20bc8df7b571f39651e505336bb4ee7c047a