Malicious PDF — malware analysis report

Static analysis result for SHA-256 afdf18be5fbe1741…

MALICIOUS

PDF

40.7 KB Created: 2020-08-23 18:01:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 45ed6bef677530718b02935617679f21 SHA-1: 01f32dd5c0c42d8e5b4c84469701a788237b3d95 SHA-256: afdf18be5fbe1741da9e5ab5b846c2760aaf11a89db806db462c31982862c191
120 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to benign Shopify domains, but one critical link directs to a known malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.cc/pify?keyword=completing+the+square+practice+worksheet', which is flagged as malicious. This suggests a social engineering attack aiming to redirect users to harmful 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=completing+the+square+practice+worksheet
    • http://files.miamiccr.com/uploads/1/3/1/1/131164236/76ad0a243b8511.pdf
    • https://cdn.shopify.com/s/files/1/0434/3260/7900/files/fimowomekofaraf.pdf
    • https://cdn.shopify.com/s/files/1/0433/0710/6462/files/gutezevituxis.pdf
    • https://cdn.shopify.com/s/files/1/0433/1533/1227/files/standard_enthalpies_of_formation_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0428/9455/7351/files/pamifipixegutil.pdf
    • https://cdn.shopify.com/s/files/1/0438/3621/1362/files/cbse_class_3_maths_book_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/6917/8017/files/98475710782.pdf
    • https://cdn.shopify.com/s/files/1/0437/2099/9064/files/10767661056.pdf
    • https://cdn.shopify.com/s/files/1/0435/3107/5743/files/90495178787.pdf
    • https://cdn.shopify.com/s/files/1/0437/5566/7605/files/50945791201.pdf
    • https://cdn.shopify.com/s/files/1/0430/3713/0914/files/filosofia_atomista.pdf
    • https://cdn.shopify.com/s/files/1/0435/9300/7272/files/21565512476.pdf
    • https://cdn.shopify.com/s/files/1/0439/5394/6782/files/tuxetirikunerugotaf.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_off00005fba.bin
e4340d3785a80162aca973d8d1e16c11f558f137f9948cc23533893590699dd1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FBA 5532 bytes
font_01_sfnt_off0000726f.bin
be0ea669432778302b07d0b5dda41b0343d778285f3f785c4a4a852bf373b310		 pdf-font-stream PDF embedded font (sfnt) at offset 0x726F 10380 bytes

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