Malicious PDF — malware analysis report

Static analysis result for SHA-256 a735abaf74946a87…

MALICIOUS

PDF

40.1 KB Created: 2020-08-22 20:57:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 89e8d44572a5445d1845c3407e71bace SHA-1: 26d78dfb4233658bf96952e120f07a98b1ff1eee SHA-256: a735abaf74946a8723889adbc5840dc887c6a06bdf3785f39b29b1014fc7eebf
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.cc/pify?keyword=3dmark+basic+edition+free'. This URL is presented within the document body, disguised as a free download for '3dmark basic edition free'. The file also contains a link farm heuristic, indicating a large number of external links, with the first being 'https://cdn.shopify.com/s/files/1/0433/9659/5868/files/67074649570.pdf'. No scripts were extracted, but the presence of the malicious redirector strongly suggests a phishing or social engineering attempt to lead the user to malicious content.

Heuristics 3

  • 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.
  • 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.cc/pify?keyword=3dmark+basic+edition+free
    • http://files.mrsararadian.com/uploads/1/3/1/4/131453676/725d0ad5d8b20d.pdf
    • http://files.cavershamholistics.co.uk/uploads/1/3/1/0/131070774/labifenejoseravajij.pdf
    • https://cdn.shopify.com/s/files/1/0433/9659/5868/files/67074649570.pdf
    • https://cdn.shopify.com/s/files/1/0437/9960/9505/files/everything_happens_for_a_reason_book_download.pdf
    • https://cdn.shopify.com/s/files/1/0436/0486/9277/files/59287062622.pdf
    • https://cdn.shopify.com/s/files/1/0433/2368/7067/files/81938391138.pdf
    • https://cdn.shopify.com/s/files/1/0449/7742/2494/files/boldly_i_approach_piano_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0438/3172/2141/files/44419261615.pdf
    • https://cdn.shopify.com/s/files/1/0439/7950/5822/files/convert_cdr_format_to.pdf
    • https://cdn.shopify.com/s/files/1/0432/4638/7367/files/43252240896.pdf
    • https://cdn.shopify.com/s/files/1/0437/6517/0334/files/gta_vc_cheater_apk_free.pdf
    • https://cdn.shopify.com/s/files/1/0432/7155/3189/files/gotalutomivepi.pdf
    • https://cdn.shopify.com/s/files/1/0437/1762/3957/files/statistical_learning_theory_vapnik_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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005e41.bin
1526be888d38fc43692325692c27952bf426029622c551223ce495fe459e7570		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E41 5408 bytes
font_01_sfnt_off00007081.bin
5cc5725347c42e77e63d9fc6ac3c520a873faf7992cef9d2e7c1aa43a5ffee04		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7081 10364 bytes

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