Malicious PDF — malware analysis report

Static analysis result for SHA-256 83f5ba9dea9150bf…

MALICIOUS

PDF

48.9 KB Created: 2020-08-13 21:52:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a8cf5b00063bd48af5ac16840976dfa1 SHA-1: 12046fbcf45348753525bf4d82a6fa0057c6ebe5 SHA-256: 83f5ba9dea9150bf69655824068ffbbc2062ddb34f78df44123c20dd24215d2d
150 Risk Score

Malware Insights

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

The PDF file contains a high number of embedded links, many of which point to a redirector service. The primary malicious URL identified is ttraff.com, which is known to host malicious redirectors. The document body, though partially corrupted, contains the same topic as the malicious URL, suggesting a lure for users interested in cricket games. The ML classifier also strongly indicated maliciousness.

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.com/pify?keyword=top+5+cricket+games+for+android+2019
    • http://files.alex-chien.com/uploads/1/3/1/0/131071062/tolirugapixejig.pdf
    • http://files.catholicfaithandreason.org/uploads/1/3/0/7/130739814/nebezasuwojopuzuziza.pdf
    • http://files.melissabowmanward9.ca/uploads/1/3/1/3/131398605/a7c6d2469.pdf
    • http://files.oldhamcountypolice.com/uploads/1/3/2/6/132695200/videvifi.pdf
    • https://cdn.shopify.com/s/files/1/0429/1959/2103/files/2025717915.pdf
    • https://cdn.shopify.com/s/files/1/0438/3218/0893/files/takobuxujo.pdf
    • https://cdn.shopify.com/s/files/1/0435/1007/1460/files/mowiranosubiredelaw.pdf
    • https://cdn.shopify.com/s/files/1/0435/9657/8979/files/christian_apologetics_norman_geisler.pdf
    • https://cdn.shopify.com/s/files/1/0431/4162/8072/files/kigenigasofoluwujiwotofu.pdf
    • https://cdn.shopify.com/s/files/1/0431/8553/7175/files/60162013677.pdf
    • https://cdn.shopify.com/s/files/1/0429/8558/6849/files/fakizogegelexesira.pdf
    • https://cdn.shopify.com/s/files/1/0437/5802/6903/files/8278798081.pdf
    • https://cdn.shopify.com/s/files/1/0431/9127/1586/files/giderimilugor.pdf
    • https://cdn.shopify.com/s/files/1/0435/7423/1199/files/lonuzajorikonovilux.pdf
    • https://cdn.shopify.com/s/files/1/0433/0877/7637/files/arm_hammer_baking_soda_medicinal_uses.pdf
    • https://cdn.shopify.com/s/files/1/0428/6706/4998/files/paxere.pdf
    • https://cdn.shopify.com/s/files/1/0434/3663/8369/files/lojidikuvozosurinijovuji.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_off00006842.bin
244701a477f3b795d0c60008175c6bc1b0ddd2488ff8e5059c5178e0c334b4df
pdf-font-stream PDF embedded font (sfnt) at offset 0x6842 6060 bytes
font_01_sfnt_off00007cd7.bin
ebf22f3cd72c7a11260aefa05aa6b65bb5514e50e942fd14d4dd7cf02c5cac4e
pdf-font-stream PDF embedded font (sfnt) at offset 0x7CD7 10128 bytes
font_02_sfnt_off00009fa2.bin
6e3fbd491d8b71441998836ddca0d0c102716a221ea14f8143929167ad9a79b3
pdf-font-stream PDF embedded font (sfnt) at offset 0x9FA2 16164 bytes