PDF malware analysis — malicious · a5142de43af61662

MALICIOUS

PDF

38.7 KB Created: 2020-08-02 15:08:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 4a17f045cbc581c2126d92eb4a67d2cf SHA-1: 01cf031584c3156a8fdbbf8a693af834bb1ee3ea SHA-256: a5142de43af61662e307f0aea2310bd1d20643a35dbb2d3ed6150a3feb7e8d72

160 Risk Score

Malware Insights

MITRE ATT&CK

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

The PDF contains a heuristic firing for a malicious redirector link, directing users to a URL containing 'computer virus tutorial'. It also exhibits characteristics of a link farm, with numerous embedded links to external PDFs, many hosted on Shopify. The document body, though heavily obfuscated, contains a reference to the malicious URL. The presence of a password-protected archive lure suggests the PDF is a delivery mechanism for 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.
Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE

Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
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.com/wb?keyword=computer%20virus%20tutorialspoint%20pdf
- http://files.peterantor.com/uploads/1/3/2/7/132740598/gigedo-xonas-debigulifafefil-kebofaji.pdf
- http://files.jurongdistrict22.com/uploads/1/3/0/7/130738596/2972831.pdf
- http://files.bluffsplus.com/uploads/1/3/0/8/130814460/53b61b.pdf
- http://files.myenvisionphotography.com/uploads/1/3/2/6/132681634/baxupezugivef.pdf
- https://cdn.shopify.com/s/files/1/0428/3393/6547/files/movomozoleritawabiveposob.pdf
- https://cdn.shopify.com/s/files/1/0431/8694/6206/files/fovid.pdf
- https://cdn.shopify.com/s/files/1/0435/7000/4126/files/fugavox.pdf
- https://cdn.shopify.com/s/files/1/0431/6761/3082/files/gusigetijebela.pdf
- https://cdn.shopify.com/s/files/1/0432/4291/3952/files/17028204967.pdf
- https://cdn.shopify.com/s/files/1/0428/2191/0694/files/muronedonaborib.pdf
- https://cdn.shopify.com/s/files/1/0431/9520/3745/files/kevawovazutadixaman.pdf
- https://cdn.shopify.com/s/files/1/0441/1670/5432/files/78592786300.pdf
- https://cdn.shopify.com/s/files/1/0432/5857/7046/files/72376703515.pdf
- https://cdn.shopify.com/s/files/1/0434/4093/0983/files/lulisawitunirifisutuwodul.pdf
- https://cdn.shopify.com/s/files/1/0432/2574/3515/files/xajofawunir.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_off00005cbc.bin` `32f7a222aac2e6ff993054fb9da25879bfb66f3331f6b174422e89ddb111a110`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5CBC	5152 bytes
`font_01_sfnt_off00006e27.bin` `a96321252d0c1af4e62fdd11708c69c4713a6d08328345ad15bed9a2872f0f27`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6E27	9304 bytes

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