Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d8b3eb2565628c3…

MALICIOUS

PDF

43.1 KB Created: 2020-08-22 00:59:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3c370e2f4bed6be619711cc94ff7a471 SHA-1: 381e6a68045dbbeb7b5de1b413527235fc25beda SHA-256: 0d8b3eb2565628c3691c1d3bd6359b210a9de8f3e4d6be558b290ee470b22af6
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains embedded links, with one specifically identified as a malicious redirector pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains text suggesting an 'internship project report' and mentions a deadline, indicating a social engineering lure. The presence of multiple external PDF links, including one to a known malicious redirector, strongly suggests an attempt to lead the user to malicious content or further compromise.

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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/pify?keyword=internship+project+report+pdf
    • http://magujebat.edwardschapel.org/uploads/1/3/1/4/131406387/746390.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0462/2663/6954/files/indefinite_pronouns_worksheet_grade_1.pdf
    • https://cdn.shopify.com/s/files/1/0428/9875/1641/files/37739951465.pdf
    • https://cdn.shopify.com/s/files/1/0431/6538/4866/files/58749455475.pdf
    • https://cdn.shopify.com/s/files/1/0434/7835/2022/files/36969923069.pdf
    • https://cdn.shopify.com/s/files/1/0437/2535/7210/files/18850369046.pdf
    • https://cdn.shopify.com/s/files/1/0428/4933/7500/files/14123376329.pdf
    • https://cdn.shopify.com/s/files/1/0437/7994/8695/files/manual_bookkeeping_for_small_business.pdf
    • https://cdn.shopify.com/s/files/1/0431/7600/1704/files/voretobejoxapodoxisefafur.pdf
    • https://cdn.shopify.com/s/files/1/0440/0598/2366/files/80224111235.pdf
    • https://cdn.shopify.com/s/files/1/0438/1566/5824/files/55518014244.pdf
    • https://cdn.shopify.com/s/files/1/0434/5528/3350/files/detagugiku.pdf
    • https://cdn.shopify.com/s/files/1/0433/4364/2792/files/accounting_tutorial_free_download.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000069b9.bin
d0b2057b2b023561f174d31c595ce55d2d52551398b396bf40c3b73c3bfa5fb1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69B9 5016 bytes
font_01_sfnt_off00007ac5.bin
69d967b728927a8c112ffe689eab1e7234e644964f3ce9159f85274298ded299		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7AC5 10800 bytes

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