Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a5c6d0af9f20aee…

MALICIOUS

PDF

87.8 KB Created: 2020-08-03 19:39:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a69090afea01197980db136d30783686 SHA-1: 77c9c2a644b62538213fb9fae987f44722340915 SHA-256: 2a5c6d0af9f20aee3d7d4a44260f0b381eab487eecf538ed1fe12531ff1f3522
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.cc'. This URL is further obfuscated within the document body, suggesting an attempt to lure users to a malicious site. The presence of a large number of external PDF links also indicates a link farm, a common tactic for SEO poisoning or distributing malicious content. The ML classifier strongly supports the malicious nature of this PDF.

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.cc/pify?keyword=dielectric+properties+of+nanomaterials+pdf
    • http://files.winstondavenport.com/uploads/1/3/1/1/131163601/luxepebimefep-luvoz-maxuvovukivofir.pdf
    • http://files.rwpphotoart.com/uploads/1/3/0/8/130813694/xareja.pdf
    • http://files.group-wb.com/uploads/1/3/1/3/131379277/jipudorivi.pdf
    • http://files.globalsteameducation.org/uploads/1/3/2/6/132695301/9405102.pdf
    • http://files.mikeflasterstein.net/uploads/1/3/1/4/131437680/5952768.pdf
    • https://cdn.shopify.com/s/files/1/0429/5042/6780/files/66834358663.pdf
    • https://cdn.shopify.com/s/files/1/0432/5359/6310/files/wuvakenono.pdf
    • https://cdn.shopify.com/s/files/1/0436/9291/6886/files/7340836183.pdf
    • https://cdn.shopify.com/s/files/1/0432/5376/0162/files/nawusiwerowiwalewopitomup.pdf
    • https://cdn.shopify.com/s/files/1/0434/8212/0357/files/23233116183.pdf
    • https://cdn.shopify.com/s/files/1/0428/1729/0407/files/92360218584.pdf
    • https://cdn.shopify.com/s/files/1/0428/6640/9638/files/91887816927.pdf
    • https://cdn.shopify.com/s/files/1/0437/6992/1688/files/bozixopudorijiximapixamop.pdf
    • https://cdn.shopify.com/s/files/1/0428/9236/1887/files/62951378491.pdf
    • https://cdn.shopify.com/s/files/1/0427/6341/9815/files/xewowabigizirito.pdf
    • https://cdn.shopify.com/s/files/1/0429/3174/9031/files/52754666660.pdf
    • https://cdn.shopify.com/s/files/1/0434/5715/1142/files/ambulance_victoria_cpg.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_off0001050d.bin
29866a7fa56da68742b8f366b43d9ce8cf7a7f15ebb9fe15f736c5def3c000cb
pdf-font-stream PDF embedded font (sfnt) at offset 0x1050D 5300 bytes
font_01_sfnt_off00011706.bin
acf4e0a446a621d5a2b34fe06f840bfceac36768eedc5d5daf59d716b10fccf7
pdf-font-stream PDF embedded font (sfnt) at offset 0x11706 10780 bytes
font_02_sfnt_off00013c19.bin
835a3f14453f10f8bfb72dc7dfdc418765897efb114a3eac864518c3ecbe881f
pdf-font-stream PDF embedded font (sfnt) at offset 0x13C19 16236 bytes