Malicious PDF — malware analysis report

Static analysis result for SHA-256 079636491d562ac8…

MALICIOUS

PDF

53.9 KB Created: 2020-08-12 03:12:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: eac3642ea3a06f9102a65f1c06830613 SHA-1: 7c6786e2f47da2efed142f6f4a07aa0d97847927 SHA-256: 079636491d562ac8385486231f7b5ed62a1cf7151d2b42e6245d6a597149f52c
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one specifically identified as a malicious redirector. The document body, though partially corrupted, includes text that appears to be SEO-optimized content to mask the malicious intent. The ML classifier strongly flagged this PDF as malicious, indicating a high likelihood of it being used for malicious purposes such as phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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.ru/pify?keyword=rig+veda+upakarma+procedure+in+tamil+pdf
    • http://limijile.millersgardenservices.co.uk/uploads/1/3/1/4/131438268/04f536.pdf
    • http://files.lincolncreekponyclub.org/uploads/1/3/0/8/130813639/galola_xisanotenewij_vekuzimo.pdf
    • http://files.phillipsitter.com/uploads/1/3/1/6/131606360/xaxopenon.pdf
    • http://nuxowifub.annranderaadpottery.com/uploads/1/3/1/6/131607029/791390f1c2.pdf
    • http://files.strangelight.org/uploads/1/3/2/8/132814241/9699942.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • https://cdn.shopify.com/s/files/1/0438/1959/7981/files/61173213621.pdf
    • https://cdn.shopify.com/s/files/1/0427/9717/0847/files/woneponukaluz.pdf
    • https://cdn.shopify.com/s/files/1/0431/1020/3556/files/48603283215.pdf
    • https://cdn.shopify.com/s/files/1/0429/3951/5039/files/on_the_shoulders_of_giants_stephen_hawking.pdf
    • https://cdn.shopify.com/s/files/1/0450/8450/8325/files/63860630974.pdf
    • https://cdn.shopify.com/s/files/1/0430/1750/2869/files/busoxodegadomegaro.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/serananovuja.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/voriwatovetizejewadodo.pdf
    • https://cdn.shopify.com/s/files/1/0436/1804/2018/files/nekolusirel.pdf
    • https://cdn.shopify.com/s/files/1/0437/7129/7943/files/piramoluxonete.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/38461358607.pdf
    • https://cdn.shopify.com/s/files/1/0432/8954/2809/files/mobelofitanesojizitulo.pdf
    • https://cdn.shopify.com/s/files/1/0430/6819/4965/files/pasodi.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_off00007f82.bin
5accbf80ce1fbffe304e44eac14bb460974698b100c64cd6e287c9c0d87a5ddd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F82 5428 bytes
font_01_sfnt_off000091f1.bin
a3593e8a5cf28588d6267fc9cd422dd011e6131ec396f464389e92889043ace6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x91F1 3936 bytes
font_02_sfnt_off00009fe1.bin
94c39edd44b97f18de15076b87972554cedb2ac0e0cbef46ede1e22383e99bac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9FE1 13612 bytes

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