PDF malware analysis — malicious · b1594fc365bce2eb

MALICIOUS

PDF

56.2 KB Created: 2020-09-05 03:42:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 37c0c61a9f73319484424d62823245d8 SHA-1: ea5d47a0646941a297b0b8b6e435a1840a839060 SHA-256: b1594fc365bce2ebc7742dc4fe2e3022f2017ecc21c3597f586b5bffe335cd4f

152 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged by multiple critical heuristics for containing malicious redirector links and a large number of external PDF links, suggesting a link farm or SEO manipulation tactic. One of the primary links directs to a known malicious redirector. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the document body and heuristics point to a malicious link distribution scheme.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

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.
Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL

The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
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/wix?keyword=blackmagic+micro+cinema+4k+manual
- https://cdn.shopify.com/s/files/1/0433/2060/6885/files/lexidumifinufewisosexe.pdf
- https://cdn.shopify.com/s/files/1/0431/7003/7924/files/altruism_book.pdf
- https://cdn.shopify.com/s/files/1/0440/7505/7302/files/acreditacin_universitaria.pdf
- https://cdn.shopify.com/s/files/1/0439/5663/3758/files/8236631780.pdf
- https://cdn.shopify.com/s/files/1/0432/8649/5397/files/dogofutufu.pdf
- https://static.usrfiles.com/ugd/bd1fc0_e1a250cdb05448789c8f35a656c59890.pdf
- https://static.usrfiles.com/ugd/17beed_e6adb1292db0435683649f3531004dee.pdf
- https://cdn.shopify.com/s/files/1/0431/0417/4233/files/wuzodanumag.pdf
- https://cdn.shopify.com/s/files/1/0428/1312/8863/files/miracle_cream_shark_tank.pdf
- https://cdn.shopify.com/s/files/1/0431/0702/5056/files/revupufemux.pdf
- https://cdn.shopify.com/s/files/1/0433/2588/2518/files/stardew_foraging_guide.pdf
- https://cdn.shopify.com/s/files/1/0463/2166/4160/files/abbyy_finereader_mac_free.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_off00009b2f.bin` `038e80b0d9e615037be02f72b8ed9e14209d047c6e00718c6e9fbe7c64ee4a05`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9B2F	5144 bytes
`font_01_sfnt_off0000aca3.bin` `d532dc7a73d4e085aeb7e0a6ffe226b7b6544351f3afe10d11e7e53a72a7f747`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xACA3	12020 bytes

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