Malicious PDF — malware analysis report

Static analysis result for SHA-256 125ed760453876a5…

MALICIOUS

PDF

47.3 KB Created: 2020-08-18 16:53:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7e0a4314c6eb40e17251fe75bf40f9b6 SHA-1: c1d71270cef8660b1cf7c14b65215f4fb81a4cf2 SHA-256: 125ed760453876a585005bff6843368a8620bbb7e9b5b3405ae330f82a5b786d
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.ru/pify?keyword=childrens+converse+size+guide+uk'. Additionally, it exhibits characteristics of a PDF link farm, embedding numerous external links, many of which are to Shopify-hosted PDFs. The document body, though heavily obfuscated, contains the same malicious URL and benign-looking Shopify links, suggesting a lure to disguise the malicious redirection. No scripts were extracted, but the presence of embedded URLs and the redirector heuristic strongly indicate a phishing or malware distribution 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=childrens+converse+size+guide+uk
    • http://files.andreablackerby.com/uploads/1/3/0/8/130813317/lanepowuvepenez_wekewevituke_fixojiboku_vebumew.pdf
    • http://files.katie-alexander.com/uploads/1/3/0/8/130813364/6321496.pdf
    • http://files.mariehazelwooddietitian.com.au/uploads/1/3/0/8/130814516/5962833.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/6326/9789/files/apa_manual_6th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0432/3383/7219/files/acta_constitutiva_sociedad_anonima_para_llenar.pdf
    • https://cdn.shopify.com/s/files/1/0433/8289/8840/files/36057234868.pdf
    • https://cdn.shopify.com/s/files/1/0435/4582/1338/files/32853315606.pdf
    • https://cdn.shopify.com/s/files/1/0435/9212/2536/files/kidinopevikafupulag.pdf
    • https://cdn.shopify.com/s/files/1/0428/4976/3494/files/51776148727.pdf
    • https://cdn.shopify.com/s/files/1/0437/1690/3080/files/93653238493.pdf
    • https://cdn.shopify.com/s/files/1/0437/3735/0305/files/5539490394.pdf
    • https://cdn.shopify.com/s/files/1/0437/7948/9950/files/netgear_dynamic_dns.pdf
    • https://cdn.shopify.com/s/files/1/0432/8570/8968/files/sibepunu.pdf
    • https://cdn.shopify.com/s/files/1/0434/0488/6166/files/ninevovelexo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0301/0468/files/23117996582.pdf
    • https://cdn.shopify.com/s/files/1/0435/8592/9375/files/electron_deficient_molecules.pdf
    • https://cdn.shopify.com/s/files/1/0432/7089/7824/files/lokujemisawu.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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off00009437.bin
4a03ed2b67f94793ac2d4cc996b245ffea71249412a529ddfcea45c48817c1c3		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x9437 18156 bytes
font_00_sfnt_off00005be7.bin
5cdc56e84f95e9bc035328779213970926ca2add8c3fa29aca551a847c794e19		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5BE7 5068 bytes
font_01_sfnt_off00006d25.bin
43c3facd5cdae9ad91ce28f2ace716091251cd9aa5dce3c3e149ec55e54b861a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D25 11668 bytes

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