PDF malware analysis — malicious · c8ace5220090feaf

MALICIOUS

PDF

51.0 KB Created: 2020-09-02 01:45:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: d9262caa8bf86ff8abdd862100da3266 SHA-1: a79046fb584b2180dc8712a1c6a05ba8d478671e SHA-256: c8ace5220090feafc358dcd29650304cda7ca41a5655616f5f1b416678e9be02

128 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a heuristic firing for a malicious redirector link, pointing to ttraff.ru. The document body, though heavily obfuscated, contains this URL and appears to be a lure for 'anti ragging form for mbbs students'. The file also exhibits characteristics of a link farm, with numerous embedded URLs, many hosted on static.usrfiles.com. The primary malicious IOC is the ttraff.ru redirector, which is likely used to funnel victims to further malicious 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.ru/wix?keyword=anti+ragging+form+for+mbbs+students
- https://static.usrfiles.com/ugd/b8c837_de65114771cc4a4da31b3019933ad817.pdf
- https://static.usrfiles.com/ugd/253000_d9413b381cb54329ba36fb5e7e322f33.pdf
- https://static.usrfiles.com/ugd/e2f197_ee5b43aa2c92493685fa13fd74e74e4e.pdf
- https://static.usrfiles.com/ugd/b8c837_6ab057cb3f5448f79db5af0863f7287d.pdf
- https://static.usrfiles.com/ugd/fd3290_4819b3d0e35843e0997af23c89c37ba1.pdf
- https://static.usrfiles.com/ugd/ae059d_480da5a9474a45f0a1efdaf488858394.pdf
- https://static.usrfiles.com/ugd/8127dd_909708244b2041a18279222e7d0d5fcd.pdf
- https://static.usrfiles.com/ugd/b8c837_05993c81144f4aa2b98467f1fba49b0c.pdf
- https://cdn.shopify.com/s/files/1/0433/4324/9576/files/75334665637.pdf
- https://cdn.shopify.com/s/files/1/0433/6022/3387/files/kerawitalematevezemofaz.pdf
- https://cdn.shopify.com/s/files/1/0434/6960/2978/files/63034547911.pdf
- https://static.usrfiles.com/ugd/a18aa6_2dee9428e82d4988afc101161e92fa72.pdf
- https://static.usrfiles.com/ugd/3c8574_f2633261c77142f9b8a89340111f2676.pdf
- https://static.usrfiles.com/ugd/fb83f1_5530135844734a3c99f6b296f530fe4f.pdf
- https://static.usrfiles.com/ugd/df4650_f4dbdf6273f842a4846d0f6871864ecb.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.

Filename	Kind	Source	Size
`font_00_sfnt_off00008ab9.bin` `be92ed390bd526a6d3598962b1e7d2edf56642f4aff92fede590dab42e1202e8`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8AB9	5324 bytes
`font_01_sfnt_off00009cbd.bin` `c483df24937452e6545d7225354c51de6fadaadbb5e124c499278363e7adbfc3`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9CBD	10288 bytes

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