Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7ffb4528b78e017…

MALICIOUS

PDF

40.3 KB Created: 2020-08-25 16:10:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a3fbee3bd597349bdf24e8afb9a14412 SHA-1: 533511e57ee97ea43f042efbd46c5bb288ea8666 SHA-256: d7ffb4528b78e017cf0c842288c1e60f09608b0daf7bf333eb42277a3a6b8024
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains the text 'Facebook app link android' and the malicious URL. This suggests a phishing or social engineering attack aiming to trick users into clicking the link. The presence of a large number of external PDF links, many hosted on Shopify, further indicates a link farm or redirection strategy. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.com/pify?keyword=facebook+app+link+android
    • http://tamire.myhillchurch.com/uploads/1/3/2/7/132740763/vopewo-rebal-betuzolov.pdf
    • https://cdn.shopify.com/s/files/1/0430/8484/1124/files/7073742458.pdf
    • https://cdn.shopify.com/s/files/1/0438/7930/1275/files/pufotubuvepig.pdf
    • https://cdn.shopify.com/s/files/1/0430/2084/5210/files/cover_letter_template_australia_word.pdf
    • https://cdn.shopify.com/s/files/1/0437/5543/8241/files/52515917443.pdf
    • https://cdn.shopify.com/s/files/1/0430/9617/8849/files/wemukusuzeduguzurewixem.pdf
    • https://cdn.shopify.com/s/files/1/0438/9493/1624/files/functions_of_human_body_organs.pdf
    • https://cdn.shopify.com/s/files/1/0437/7850/6909/files/andariki_ayurvedam_books_free_download_in_telugu.pdf
    • https://cdn.shopify.com/s/files/1/0438/2166/2365/files/adobe_premiere_elements_11.pdf
    • https://cdn.shopify.com/s/files/1/0433/4518/2888/files/alvin_and_chipmunks_cartoon.pdf
    • https://cdn.shopify.com/s/files/1/0439/0807/1576/files/anatomy_and_physiology_for_nurses_roger_watson.pdf
    • https://cdn.shopify.com/s/files/1/0440/5372/5334/files/35410443524.pdf
    • https://cdn.shopify.com/s/files/1/0445/9390/5828/files/muslim_girl_name_list.pdf
    • https://cdn.shopify.com/s/files/1/0432/5041/7827/files/highsnobiety_store_guide_hong_kong.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_off000060de.bin
80f924de51a8dd9f375a86c3fcf38a38176a30a18b6ddbe6ea61ae75b99dfe86		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60DE 5048 bytes
font_01_sfnt_off00007207.bin
672fd3fc086e9d9ee9c66b7dedc7277a33184c4df83d872ed2a359212bf37a31		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7207 10156 bytes

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