Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5a6592a6a1dfc02…

MALICIOUS

PDF

54.2 KB Created: 2020-09-09 07:38:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a555d716d590d8ca5b0639c0625d0e56 SHA-1: 32b9c81913bb17a72731ca1ce7e90737d65a382c SHA-256: e5a6592a6a1dfc0262816cc3daaa15bb57e1356440ba4a20d0ff7edd37081ade
150 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK, indicating it directs users to a known malicious URL. The document body, though heavily obfuscated, contains the text 'Filler guide fairy tail' and the malicious URL, suggesting a lure to a scam or phishing site. The PDF also contains a large number of embedded links, flagged by PDF_SEO_LINK_FARM, which are likely part of a link farm to improve SEO for 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.me/wix?keyword=filler+guide+fairy+tail
    • https://cdn.shopify.com/s/files/1/0429/4452/8550/files/like_a_prayer_choir_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0434/0157/6604/files/exponent_rules_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0427/7246/3772/files/analysing_advertisements_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0431/0905/6668/files/suwevorutasumixebaxudafes.pdf
    • https://cdn.shopify.com/s/files/1/0432/1778/0896/files/likojobisufuledudixax.pdf
    • https://cdn.shopify.com/s/files/1/0432/4166/8772/files/faziwizukawozumowapus.pdf
    • https://cdn.shopify.com/s/files/1/0437/0412/3557/files/kuxoxekuwapoxobusuj.pdf
    • https://cdn.shopify.com/s/files/1/0431/7285/5957/files/savukokuboxesurotiferos.pdf
    • https://cdn.shopify.com/s/files/1/0428/2623/6071/files/bestand_kleiner_maken_mac.pdf
    • https://cdn.shopify.com/s/files/1/0431/4929/5776/files/free_bar_graph_template.pdf
    • https://cdn.shopify.com/s/files/1/0437/4052/8792/files/how_many_weeks_in_month.pdf
    • https://cdn.shopify.com/s/files/1/0439/5152/1947/files/xipawasozubi.pdf
    • https://cdn.shopify.com/s/files/1/0439/1036/5339/files/crimsom_room_walkthrough.pdf
    • https://cdn.shopify.com/s/files/1/0457/5651/4460/files/sonimumobujoxidelo.pdf
    • https://cdn.shopify.com/s/files/1/0431/5276/9192/files/fikix.pdf
    • https://cdn.shopify.com/s/files/1/0430/8526/7097/files/58312784832.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007ada.bin
a70a2b338df3ffc76847d3cd834b0f7673cf2c8ca0e6e31370ebfc43505074cb
pdf-font-stream PDF embedded font (sfnt) at offset 0x7ADA 4620 bytes
font_01_sfnt_off00008aa8.bin
431e5ac13c176eee2bbc9e87bfa47dcb46aae4ce5cceff27d7a2d597c2fded7c
pdf-font-stream PDF embedded font (sfnt) at offset 0x8AA8 15964 bytes
font_02_sfnt_off0000bbc3.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f
pdf-font-stream PDF embedded font (sfnt) at offset 0xBBC3 4324 bytes