PDF malware analysis — malicious · 4660234047ce5d1f

MALICIOUS

PDF

37.2 KB Created: 2020-09-14 02:17:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 4bc7e8728ecbad2efb2c599666552569 SHA-1: deee8b9a56c8fdc37dc64a62629f6cc08b7bb6d7 SHA-256: 4660234047ce5d1fcea00650ebb6486ea768de42f41bcf94f6d6e375b55610eb

120 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, disguised with a keyword relevant to educational content. It also functions as a link farm, pointing to numerous other PDFs hosted on static.usrfiles.com, likely for SEO poisoning or to spread malicious links. The document body, though heavily corrupted, contains the same lure text and URLs as found in the heuristics, confirming the malicious intent.

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.link/wix?keyword=leaf+anatomy+worksheet+answer+key+biology+corner
- http://wegujum.nekimastrategy.net/uploads/1/3/1/0/131070867/roligudamewowi_bofalunewovip_lumusi.pdf
- http://files.lidwear.com/uploads/1/3/1/4/131453329/lajotitopubeter.pdf
- http://tiwere.sahasbarve.com/uploads/1/3/0/7/130775451/dezapid.pdf
- http://tizoso.prayerballoons.org/uploads/1/3/1/3/131381806/c1bba.pdf
- http://files.achieversmindset.org/uploads/1/3/0/7/130775424/5a432de56e9f.pdf
- https://static.usrfiles.com/ugd/8aba0c_536d42deb7ef4d29abe228cb5ddb2264.pdf
- https://static.usrfiles.com/ugd/b222ea_fb3d6b51cded4589b1563140c34a1434.pdf
- https://static.usrfiles.com/ugd/594ae5_fb6c382624f04555846f2fd1d835f4a1.pdf
- https://static.usrfiles.com/ugd/ae059d_b897b7b70727444fb06eae870bca8a79.pdf
- https://static.usrfiles.com/ugd/f91cf1_581a1343d52f46db88a94f183b03cfb7.pdf
- https://static.usrfiles.com/ugd/5b9365_b15c4ef878f043288c863191ae67adaf.pdf
- https://static.usrfiles.com/ugd/221eaa_0864f9cb85ef4de6a0ed32fe94ae66e4.pdf
- https://static.usrfiles.com/ugd/c8df25_1f5118120ba34abf9a5ddc31b882d962.pdf
- https://static.usrfiles.com/ugd/3f8d85_4ea40d0d35ef4cada3e76fff8459c977.pdf
- https://static.usrfiles.com/ugd/e948c1_0bd4cb632c9644aaa0da4b95bbd7086b.pdf
- https://static.usrfiles.com/ugd/16a96a_9e8d41976d6a49798de96d9cef6119de.pdf
- https://static.usrfiles.com/ugd/6e3131_49b5cb73acb9409d83a67e8de73fd65a.pdf
- https://static.usrfiles.com/ugd/63d3ad_dd2b729c8f094d3ab3c1b9f3fb9da9d0.pdf
- https://static.usrfiles.com/ugd/4725f1_3ef725570762470bbc4ac8e7374c12cb.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_off0000528e.bin` `09a0ffe528cb264050df65b9515e40ddb39ec910e247a200ef27f61ace64d5e3`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x528E	5632 bytes
`font_01_sfnt_off000065b9.bin` `c657a2bb80485e8a58e5d51f7a2d45ac191d782db119150f49e9785741915fea`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x65B9	9888 bytes

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