Malicious PDF — malware analysis report

Static analysis result for SHA-256 5481f80f4b04fbfe…

MALICIOUS

PDF

55.6 KB Created: 2020-08-18 19:42:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e065061498a2fd38d75a89299ed92a26 SHA-1: 7d6bce2e10654708da63c7d6833c29ba4e7c7657 SHA-256: 5481f80f4b04fbfe01a742af9c9c41ff0abf50471bed688ccf14ef701ec9631c
130 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK pointing to ttraff.cc. Another critical heuristic, PDF_SEO_LINK_FARM, indicates a large number of external PDF links, with the first being to cdn.shopify.com. The document body contains text suggesting a lure for free slides, and a low-severity heuristic indicates a visual download button. The primary attack vector appears to be tricking the user into clicking a malicious link disguised as a download.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=slide+ppt+gratis+lucu
    • http://zijaf.delytefulpapillons.com/uploads/1/3/0/7/130775286/junoletepunof.pdf
    • http://files.sellmymacbook.com/uploads/1/3/0/7/130776490/salodojiw.pdf
    • http://files.psychotherapeute-paris.net/uploads/1/3/0/8/130813913/linuruwivodilonozo.pdf
    • https://cdn.shopify.com/s/files/1/0432/2931/5239/files/bibafe.pdf
    • https://cdn.shopify.com/s/files/1/0427/9474/6023/files/15627092128.pdf
    • https://cdn.shopify.com/s/files/1/0437/2257/1930/files/xiwap.pdf
    • https://cdn.shopify.com/s/files/1/0432/7027/5237/files/dasikikoxixuf.pdf
    • https://cdn.shopify.com/s/files/1/0435/2750/4024/files/bemokuroxul.pdf
    • https://cdn.shopify.com/s/files/1/0433/4570/7166/files/xisipe.pdf
    • https://cdn.shopify.com/s/files/1/0437/8099/7269/files/80252110931.pdf
    • https://cdn.shopify.com/s/files/1/0429/2601/4620/files/jotedowimatutedo.pdf
    • https://cdn.shopify.com/s/files/1/0437/1070/9915/files/knuth_morris_pratt.pdf
    • https://cdn.shopify.com/s/files/1/0432/0083/9841/files/74565403115.pdf
    • https://cdn.shopify.com/s/files/1/0431/0496/0661/files/bankruptcy_act_kenya.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_off00009cea.bin
e966a0b9340f7ea68312d819afc44a3579bafbf121a9780dac92b39cfb886850		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9CEA 5344 bytes
font_01_sfnt_off0000af1b.bin
84cdf2e25253181287baced76d852508dffc33b5b7f20fa85b5571aad842f2c0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAF1B 10128 bytes

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