Malicious PDF — malware analysis report

Static analysis result for SHA-256 90f831e26c1dcc3a…

MALICIOUS

PDF

86.2 KB Created: 2020-08-08 05:06:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: adac2315f258cb6f2da69710e7d7daac SHA-1: 52c2208294af0b7599fd67df5d9e976391b7c165 SHA-256: 90f831e26c1dcc3a55b5e92f42ce45e17c304f902ee29ef9ba6bd106965d27b6
214 Risk Score

Malware Insights

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

The PDF file contains multiple heuristics indicating it is a lure for advance-fee scams and phishing. It includes a link to a known malicious redirector, ttraff.cc, which is likely used to direct users to a scam or phishing site. The document body, though heavily obfuscated, contains text related to 'cashless banking system' and a URL that appears to be part of a link farm, further supporting the scam lure.

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.
  • 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=the+impact+of+cashless+banking+system+in+nigeria+pdf In PDF document text
    • http://files.millersgardenservices.co.uk/uploads/1/3/1/6/131606128/lavezoxajuf.pdfIn PDF document text
    • http://files.truewealthfg.com/uploads/1/3/2/7/132710687/migejowo.pdfIn PDF document text
    • http://files.liveandletlive.co.nz/uploads/1/3/2/6/132696174/merepurojafone-nafulinuzisejer-movirekorid.pdfIn PDF document text
    • http://files.rebeccajoymohrlang.com/uploads/1/3/1/3/131381679/1801471.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/1/0435/7944/1307/files/gasagunojiduviwe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7503/4520/files/97970012422.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4349/4807/files/84277175211.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3698/2944/files/vagutajiwunadiguxusele.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2675/0357/files/sukimugizolezu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7207/8499/files/vce_further_maths_textbook.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5198/3783/files/28736545286.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9201/7305/files/academic_year_calendar_2020_20.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7426/3963/files/72975400919.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3782/6973/files/51084833533.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9094/3904/files/84904011353.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4995/1125/files/sopurijiwebororelesawub.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9775/9643/files/volegokipogo.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_off00010706.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10706 5824 bytes
SHA-256: db97c8c45b6b3abae531876e4cf0239e4e0e1798d17b4bbf1e9833ff95280d41
font_01_sfnt_off00011aab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AAB 15504 bytes
SHA-256: e103551676f0b6318ac497e36ff86952e98d2fc199b80140a0a966285c26e41a