Malicious PDF — malware analysis report

Static analysis result for SHA-256 10d5adc07fc466fa…

MALICIOUS

PDF

33.6 KB Created: 2020-08-14 11:10:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f011f3f2216624483d9df5aabe66806c SHA-1: df3ae3917525d3970fca503314c9801d6577588b SHA-256: 10d5adc07fc466fadeb20a1d813c1f6fc1a30e930e6d8315488bddf8c43a6c2d
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains hosting other PDFs, suggesting a link farm or SEO manipulation tactic. One critical heuristic identified a link to a known malicious redirector, ttraff.ru, which is likely the primary malicious destination. The document body is heavily obfuscated and contains what appears to be junk data, but the embedded URL is clearly visible. No scripts were extracted, but the presence of numerous links and the malicious redirector strongly indicate a phishing or malicious redirection attempt.

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=bhajan+ringtone++pagalworld.+io
    • http://files.doublertack.com/uploads/1/3/2/6/132682281/9ad19eea05c.pdf
    • http://files.soulfulheartsstudio.com/uploads/1/3/1/8/131871477/rolodelatini_kewag.pdf
    • http://woxotimov.kassotislab.org/uploads/1/3/0/7/130775432/9335300.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/6282/0005/files/pilib.pdf
    • https://cdn.shopify.com/s/files/1/0440/5913/2069/files/29518899825.pdf
    • https://cdn.shopify.com/s/files/1/0430/2022/2627/files/vodejipuzuporisorelup.pdf
    • https://cdn.shopify.com/s/files/1/0430/9227/9445/files/hematology_test_book.pdf
    • https://cdn.shopify.com/s/files/1/0438/6072/1829/files/89226932970.pdf
    • https://cdn.shopify.com/s/files/1/0432/3665/5259/files/93507470750.pdf
    • https://cdn.shopify.com/s/files/1/0432/6581/8789/files/75737539903.pdf
    • https://cdn.shopify.com/s/files/1/0433/8050/6791/files/php_array_to_string.pdf
    • https://cdn.shopify.com/s/files/1/0435/0545/1160/files/cd4049_datasheet.pdf
    • https://cdn.shopify.com/s/files/1/0433/8355/4206/files/radazumom.pdf
    • https://cdn.shopify.com/s/files/1/0428/5435/1015/files/advanced_sql_tutorial_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/1785/4373/files/aluminum_hydroxide_msds.pdf
    • https://cdn.shopify.com/s/files/1/0431/2891/4074/files/86911953703.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_off000044ec.bin
a5cbaba9b3a4f2f0d2e7b3cb0bef0f173d2518c6d750602ce37f62b164d1ea3f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x44EC 5292 bytes
font_01_sfnt_off000056f6.bin
b89ea6c19934e703bda1fc13860dea72c01e77583e6321680053a74db84c49c8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x56F6 9644 bytes

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