PDF malware analysis — malicious · 3d758dec72f682a6

MALICIOUS

PDF

48.4 KB Created: 2020-07-31 06:45:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 6dc0d2bf3abd31452f15539455662941 SHA-1: a147e439fdda69ebafef3ad4962b11d7fc30c2c5 SHA-256: 3d758dec72f682a643f99550c6947a2285ffb23f0af0ae1a3f18d52e04ed031f

120 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains numerous embedded links, with the primary heuristic firing indicating a link to a known malicious redirector. The document body, though heavily obfuscated, suggests a lure related to 'Integral calculus pdf with solutions'. The presence of multiple external PDF links, many hosted on Shopify, further supports the SEO link farm tactic. The file's purpose appears to be redirecting users to malicious infrastructure.

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/pify?keyword=integral+calculus+pdf+with+solutions
- http://files.maritzavives.com/uploads/1/3/2/8/132815346/zotowelew_lotavapibo_zevubebesoden_sodagufeje.pdf
- http://files.cairnsmoirconnections.org/uploads/1/3/2/7/132740586/1754373.pdf
- http://files.poehaku.com/uploads/1/3/1/6/131607239/ab7f23f.pdf
- http://files.roejendradesigns.com/uploads/1/3/1/4/131406762/wugagumigejo.pdf
- http://files.alma-cac.org/uploads/1/3/0/9/130969811/funevo.pdf
- http://files.maritzavives.com/uploads/1/3/2/8
- https://cdn.shopify.com/s/files/1/0433/6130/4728/files/26551102905.pdf
- https://cdn.shopify.com/s/files/1/0428/2528/5791/files/lopogifexilinajegirarare.pdf
- https://cdn.shopify.com/s/files/1/0430/5122/1146/files/69578334694.pdf
- https://cdn.shopify.com/s/files/1/0431/5768/4375/files/87297650719.pdf
- https://cdn.shopify.com/s/files/1/0434/4283/1522/files/81373610246.pdf
- https://cdn.shopify.com/s/files/1/0438/0993/1424/files/3692634178.pdf
- https://cdn.shopify.com/s/files/1/0433/0687/7080/files/pitoparejiki.pdf
- https://cdn.shopify.com/s/files/1/0431/9671/1069/files/20275441870.pdf
- https://cdn.shopify.com/s/files/1/0434/4276/5976/files/norexejixogenakunimaxuta.pdf
- https://cdn.shopify.com/s/files/1/0436/3704/7449/files/91842768795.pdf
- https://cdn.shopify.com/s/files/1/0432/2505/5389/files/98625230877.pdf
- https://cdn.shopify.com/s/files/1/0430/4997/5961/files/14289682040.pdf
- https://cdn.shopify.com/s/files/1/0429/5809/4495/files/27510781555.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_off000075e1.bin` `bc4bb0377b6130544d11ddc8697103ba11f57927c6e300923f6eeb58b13b84aa`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x75E1	5328 bytes
`font_01_sfnt_off000087ff.bin` `6935d9065e36adcfb6ee0fd97f6693ab14cb14773e626aef02dbc29d249a3564`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x87FF	14288 bytes

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