Malicious PDF — malware analysis report

Static analysis result for SHA-256 834cf1dd84d91f82…

MALICIOUS

PDF

47.9 KB Created: 2020-08-17 09:38:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1ee2c836c6260a5ceed58ba1eec807ae SHA-1: 2af2f5e36031527d5081d56e6e3f048cd0c8c3fa SHA-256: 834cf1dd84d91f820ec2972ccb441cb39412a60448d6777ecd8bf2fac3b5895e
128 Risk Score

Malware Insights

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

The PDF contains a mass link farm pointing to various PDF files, with a primary link to a known malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.cc/pify?keyword=chess+app+android+iphone', which is flagged as a malicious redirector. This suggests the document is designed to lead users to malicious content, likely a malware download or phishing site, by exploiting a sense of urgency or interest in the linked content.

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=chess+app+android+iphone
    • http://files.madlyeclectic.com/uploads/1/3/1/4/131483253/nuwitoduku_xafozovininu_lekilirox_navagad.pdf
    • http://gosimur.australiandisabilitysport.com.au/uploads/1/3/1/3/131383483/bokakuz.pdf
    • http://vorukem.professionalbusinessplans.com.au/uploads/1/3/1/0/131070178/mokanagef.pdf
    • http://vatimetut.hyeleedesign.com/uploads/1/3/2/7/132710712/65f5cc2c.pdf
    • http://zujopu.simixusa.com/uploads/1/3/0/7/130776811/d6256.pdf
    • https://cdn.shopify.com/s/files/1/0428/5943/0047/files/bluestacks_apk_ykleme_hatas.pdf
    • https://cdn.shopify.com/s/files/1/0428/0382/2755/files/guia_autometrica_libro_negro.pdf
    • https://cdn.shopify.com/s/files/1/0435/9805/3535/files/lugezarisave.pdf
    • https://cdn.shopify.com/s/files/1/0431/3559/8758/files/sanuvuka.pdf
    • https://cdn.shopify.com/s/files/1/0432/6329/5650/files/duff_by_kody_keplinger.pdf
    • https://cdn.shopify.com/s/files/1/0431/8714/2818/files/94586738771.pdf
    • https://cdn.shopify.com/s/files/1/0428/5821/7631/files/sudonarinezajaxa.pdf
    • https://cdn.shopify.com/s/files/1/0431/1056/4002/files/arthritis_back_pain_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0429/8365/3527/files/xepogu.pdf
    • https://cdn.shopify.com/s/files/1/0438/3670/2870/files/calligraphy_guide.pdf
    • https://cdn.shopify.com/s/files/1/0427/4244/8295/files/zarowokesuliwoguza.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_off00007d61.bin
1564f2fbe896e0483dc5a5f5e8d64f5bae2fc0d840b0b4320b8081a3685a70d4
pdf-font-stream PDF embedded font (sfnt) at offset 0x7D61 4920 bytes
font_01_sfnt_off00008e0a.bin
dc7b6f1a36e108ff78cccc094f04ef6c476426920d9bb7b1321fa6100523f112
pdf-font-stream PDF embedded font (sfnt) at offset 0x8E0A 10748 bytes