PDF malware analysis — malicious · 794b86b6559fb415

MALICIOUS

PDF

54.9 KB Created: 2020-08-02 23:39:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 91505a5bf6484779d4158f4a9c6f7509 SHA-1: 37b184fac322ec9b044715906d3fb3df5f431678 SHA-256: 794b86b6559fb415b05580973103788ddb3cccbd0e99f5ae5d3b777de88dfdac

120 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link that redirects to a malicious URL, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains text related to a 'chemistry lab manual' and the malicious URL itself, suggesting a lure. The PDF_SEO_LINK_FARM heuristic indicates a large number of outbound links, likely for SEO manipulation or to distribute the malicious payload across multiple benign-looking domains. The primary malicious IOC is the redirector URL.

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=chemistry+lab+manual+uc+davis+2b
- http://files.stlawrencelifeteen.com/uploads/1/3/1/4/131483147/guzovajosugepa-nukodifofoduj.pdf
- http://files.autochthonapn.com/uploads/1/3/0/7/130739625/2478790.pdf
- http://files.lindenfestil.com/uploads/1/3/0/8/130874257/xofujunokanitit-zowijek-rarefi.pdf
- https://cdn.shopify.com/s/files/1/0438/6678/3899/files/45606736335.pdf
- https://cdn.shopify.com/s/files/1/0432/6909/5590/files/81343361272.pdf
- https://cdn.shopify.com/s/files/1/0432/6234/5384/files/33488738848.pdf
- https://cdn.shopify.com/s/files/1/0429/3555/0119/files/zewaxesal.pdf
- https://cdn.shopify.com/s/files/1/0429/2309/8279/files/besanaboba.pdf
- https://cdn.shopify.com/s/files/1/0434/3011/7526/files/42404043486.pdf
- https://cdn.shopify.com/s/files/1/0434/8136/6693/files/sekipunoge.pdf
- https://cdn.shopify.com/s/files/1/0435/1796/8543/files/skyrim_guide_book.pdf
- https://cdn.shopify.com/s/files/1/0437/7293/6341/files/jelojuvalogulejo.pdf
- https://cdn.shopify.com/s/files/1/0434/8330/0005/files/zawaforadu.pdf
- https://cdn.shopify.com/s/files/1/0430/0665/6666/files/64829410112.pdf
- https://cdn.shopify.com/s/files/1/0432/9000/1572/files/1253200332.pdf
- https://cdn.shopify.com/s/files/1/0434/7274/8710/files/falof.pdf
- https://cdn.shopify.com/s/files/1/0428/4016/2467/files/tulan.pdf
- https://cdn.shopify.com/s/files/1/0428/2168/1315/files/rorevuxisadebepolapupebas.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_off000097bc.bin` `36b3f59b7b33176be3aa336867560e32e67c5d1b71710037925da18f7fdd4965`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x97BC	5516 bytes
`font_01_sfnt_off0000aa51.bin` `0b7300853ec1200f47ad403f6fb23d58b88e9d36bfe6d99ea8c1124fd36e29f8`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xAA51	10644 bytes

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