Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a8ded5556ff4c28…

MALICIOUS

PDF

43.0 KB Created: 2020-09-01 00:12:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d636b7f95e1fa342a70f3da867531709 SHA-1: 0e329cfd7e0526a28f69b51fc53f9128ce24a4c9 SHA-256: 0a8ded5556ff4c2880be6e3ee5ccbb80e79459e85c0e56bad2f328a01bbe76fa
182 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to malicious infrastructure, specifically identified as a "paid blue card renewal form" lure. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK and the presence of the URL strongly indicate a phishing attempt. While no scripts were extracted, the document's structure and embedded links suggest it's designed to lead the user to a malicious site, likely for credential harvesting or further malware delivery.

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.
  • 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) documents that carry no urgency or charge/dispute escalation.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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/wix?keyword=paid+blue+card+renewal+form
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0431/6243/5739/files/35536375415.pdf
    • https://cdn.shopify.com/s/files/1/0438/6599/7472/files/90528572483.pdf
    • https://cdn.shopify.com/s/files/1/0439/4464/0667/files/bugolerosutike.pdf
    • https://cdn.shopify.com/s/files/1/0445/5153/6799/files/15_prayers_of_st_bridget_audio.pdf
    • https://cdn.shopify.com/s/files/1/0432/9105/0142/files/arteriovenous_malformation_hemorrhage_brain.pdf
    • https://cdn.shopify.com/s/files/1/0430/6783/4517/files/11785251240.pdf
    • https://static.usrfiles.com/ugd/b8c837_a15e2bb99a464cf48c44de4e05ca7842.pdf
    • https://static.usrfiles.com/ugd/cbe7f7_f77eeac8cf9a4ca081e463b0f740e85d.pdf
    • https://static.usrfiles.com/ugd/bd5c68_21ab98cd510942978155864ab45cf0cf.pdf
    • https://static.usrfiles.com/ugd/963627_de351ddfe8c34152b1279606de35d661.pdf
    • https://cdn.shopify.com/s/files/1/0430/4211/1637/files/zosegakenatoterejoge.pdf
    • https://cdn.shopify.com/s/files/1/0433/4760/7720/files/69666841905.pdf
    • https://cdn.shopify.com/s/files/1/0434/5056/4773/files/vonodifiz.pdf
    • https://cdn.shopify.com/s/files/1/0428/6464/0159/files/geographic_coordinates_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0436/4032/4256/files/13631238127.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005ec1.bin
7110be634113dc859a3ba8dcf850ccb503e4e39d443651e649b1bf3c2edb5514		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5EC1 5024 bytes
font_01_sfnt_off00006fb8.bin
2fd96ecd512e5a3d470c82b643d83c7305658f77f24c50e512e12a46813f7ad3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FB8 9808 bytes
font_02_sfnt_off00009157.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9157 4324 bytes

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