Malicious PDF — malware analysis report

Static analysis result for SHA-256 37af688af1a0838b…

MALICIOUS

PDF

35.0 KB Created: 2020-08-28 17:39:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5eea708947f7cb42d7129adfcb3ef2f8 SHA-1: fe534b7e92793a3c69ec6c18f9540b5ef22aca40 SHA-256: 37af688af1a0838b83f901e3e989ff3877c2e8757c6eb551bbf6b40fe3169a15
120 Risk Score

Malware Insights

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

The PDF file was identified as malicious due to the presence of a large number of embedded links, a technique often used for link farms or redirecting users to malicious sites. One critical heuristic flagged a link to known malicious redirector infrastructure. The document body contains garbled text but includes the URL 'https://ttraff.ru/pify?keyword=separadores+de+gosset', which is also flagged as a malicious redirector. The file also contains numerous links to Shopify-hosted PDFs, suggesting a potential attempt to disguise malicious activity within a seemingly legitimate platform.

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.ru/pify?keyword=separadores+de+gosset
    • http://bogugured.nounoucergy95.com/uploads/1/3/0/7/130740169/pumutukeg.pdf
    • http://files.unfitmama.com/uploads/1/3/0/8/130874222/fisufeja.pdf
    • http://files.realjackoftrades.com/uploads/1/3/1/8/131856009/29c2025ab7e5f9.pdf
    • https://cdn.shopify.com/s/files/1/0435/5578/2819/files/mukojerobawurobovutuj.pdf
    • https://cdn.shopify.com/s/files/1/0437/4288/8097/files/68481565582.pdf
    • https://cdn.shopify.com/s/files/1/0431/6826/8456/files/collapse_of_the_republic.pdf
    • https://cdn.shopify.com/s/files/1/0427/8062/3015/files/40910564519.pdf
    • https://cdn.shopify.com/s/files/1/0432/3622/9278/files/32956986244.pdf
    • https://cdn.shopify.com/s/files/1/0466/7070/8901/files/math_antics_algebra_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0431/7016/8992/files/center_parcs_elveden_forest_map.pdf
    • https://cdn.shopify.com/s/files/1/0432/5965/8398/files/kolabanaveniruzixo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mefawubizujoki.pdf
    • https://cdn.shopify.com/s/files/1/0440/9812/5976/files/37974415576.pdf
    • https://cdn.shopify.com/s/files/1/0437/9744/6816/files/lagu_break_into_the_dark_valentine.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_off0000491c.bin
7e264b4945072e2efbd7c15dbd58128923fed5cab560774a33bf063abc5db0ca		 pdf-font-stream PDF embedded font (sfnt) at offset 0x491C 5200 bytes
font_01_sfnt_off00005ad5.bin
0e096cdd4a6c01492183a3e27b3ae08156f42516013800bf438224c03f0f3602		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5AD5 10812 bytes

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