Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ce9e513420620c0…

MALICIOUS

PDF

40.0 KB Created: 2020-08-21 10:44:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a5978ffbc13ff5c9b23131ba16c8308c SHA-1: 88497c8394f10a1a700aa2ff4cc40772df0d2b6b SHA-256: 7ce9e513420620c0ca435badabcff18ba7d3db342224f606803401fb3f770933
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a heuristic firing indicating it links to known malicious redirector infrastructure. The document body text, though partially corrupted, contains the string 'Spiderwick field guide pages' and a URL that appears to be a lure. This URL, https://ttraff.cc/pify?keyword=spiderwick+field+guide+pages, redirects to a malicious domain, confirming the attack pattern. The file also contains a large number of embedded links, many pointing to Shopify domains, which is characteristic of SEO-based link farms used to distribute malicious content.

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.cc/pify?keyword=spiderwick+field+guide+pages
    • http://files.camaroclubkc.com/uploads/1/3/1/4/131454345/firusi.pdf
    • http://pofadiva.jwhitneyart.com/uploads/1/3/0/7/130775565/2726583.pdf
    • https://cdn.shopify.com/s/files/1/0435/6633/4111/files/probiotics_book.pdf
    • https://cdn.shopify.com/s/files/1/0434/9889/7574/files/42416255025.pdf
    • https://cdn.shopify.com/s/files/1/0435/2793/0011/files/academic_english_reading_and_writing_across_the_disciplines_unisa.pdf
    • https://cdn.shopify.com/s/files/1/0434/5597/1492/files/71505550439.pdf
    • https://cdn.shopify.com/s/files/1/0450/6094/8118/files/12th_maths_formulas_list.pdf
    • https://cdn.shopify.com/s/files/1/0447/3402/1788/files/cdf_to_for_free.pdf
    • https://cdn.shopify.com/s/files/1/0455/3962/3077/files/yasin_sharif_download_free.pdf
    • https://cdn.shopify.com/s/files/1/0428/4553/6419/files/13693579719.pdf
    • https://cdn.shopify.com/s/files/1/0430/4447/0945/files/90661631214.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_off00005d5a.bin
fd8b783fedfaae46cd99e9796047bb5a56c8f7d5d345992a264cba25040776d7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D5A 5580 bytes
font_01_sfnt_off0000707f.bin
1e5ea5da62c3a7d230251b0728de0f1217fa679d2d5de032febac76f7123fca4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x707F 10288 bytes

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