Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1e0ab23e8a0e749…

MALICIOUS

PDF

38.8 KB Created: 2020-09-03 07:30:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bcf5ab421519d8fcd3c95f8c6f0673c9 SHA-1: f7fd4f13fce838c409bd7e2522a4acbbca967868 SHA-256: c1e0ab23e8a0e7493314f77adb514f7d2cd8afeec1ba9c2acde740cb8edb5b4a
150 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.ru, which is likely intended to lead the user to a malicious site. The document body, though heavily obfuscated, contains references to 'Facebook lite ipa' and the malicious URL, suggesting a social engineering lure. The presence of numerous external PDF links, many pointing to static.usrfiles.com, indicates a link farm designed to obscure the ultimate destination and potentially improve search engine ranking 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.ru/wix?keyword=facebook+lite+ipa
    • https://static.usrfiles.com/ugd/3d0627_decb701246204706a8d5d05b91e1a236.pdf
    • https://static.usrfiles.com/ugd/66c878_e8bd78ee8aa448b1a663dd8e1c17fff3.pdf
    • https://static.usrfiles.com/ugd/b8c837_fcf3dfdbe8d142f7a2f21ac2f973041f.pdf
    • https://static.usrfiles.com/ugd/9ec29b_f3423df18d754693bcdc466f8fa328aa.pdf
    • https://static.usrfiles.com/ugd/760101_89e767386ddf464b963ac121eb558fef.pdf
    • https://cdn.shopify.com/s/files/1/0431/8180/1629/files/40287993846.pdf
    • https://cdn.shopify.com/s/files/1/0433/6405/7247/files/tozefolizades.pdf
    • https://static.usrfiles.com/ugd/9219f8_82751c4329be4765a45471e3e0770bb3.pdf
    • https://static.usrfiles.com/ugd/b8c837_8d6aea8c2aee497888f58e33595ee7da.pdf
    • https://static.usrfiles.com/ugd/de9003_531199acb8bb41809b099ec586469a4f.pdf
    • https://static.usrfiles.com/ugd/f65175_07f26154aae049e5aeb59b467dd6f604.pdf
    • https://static.usrfiles.com/ugd/f55bec_5ee120fb60dd4e49a3cf7166ac43900d.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_off00005c04.bin
5071293f708f913d8d734925c9008118555deb78d6565eb32f6c24a50c479290		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C04 4812 bytes
font_01_sfnt_off00006c7b.bin
10f5513896491a166642fda2657a533c682460ced04a63b4601711a08e3405aa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C7B 10060 bytes

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