PDF malware analysis — malicious · b0867b8b0287bd1b

MALICIOUS

PDF

62.3 KB Created: 2020-08-31 13:00:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 0d6c661187c12b7c6a6d4908857dd1df SHA-1: e9a5a987d97c07a61362283069cf1324ec14f59b SHA-256: b0867b8b0287bd1b72fe9a8f3afdab8c2fd0360c0e62af4ef145e44027e0ebcd

152 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

This PDF document contains a large number of embedded links, many of which point to a link farm hosted on static.usrfiles.com. One prominent link directs to ttraff.com, a known malicious redirector. The document body, though corrupted, contains the target URL, suggesting a lure to a malicious site disguised as a software installation guide. The ML classifier strongly supports the malicious verdict.

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=como+instalar+nexus+en+fl+studio+12
- https://static.usrfiles.com/ugd/1cc7e8_0d2cb3d40912488f8ad556737ba35a9f.pdf
- https://static.usrfiles.com/ugd/b8c837_0fe6bfb818604b0380d7754413a4b16e.pdf
- https://static.usrfiles.com/ugd/ea5d7b_1b8c007d857d460a8af07eefd21eb3c0.pdf
- https://static.usrfiles.com/ugd/bae363_686773290ad74dde83df4532cd26033d.pdf
- https://static.usrfiles.com/ugd/73f3b0_40cee200ff154c869cc638e0f6dc23b7.pdf
- https://cdn.shopify.com/s/files/1/0435/2193/3466/files/45475911727.pdf
- https://cdn.shopify.com/s/files/1/0433/6844/8165/files/convert_avi_to_wmv.pdf
- https://cdn.shopify.com/s/files/1/0439/4863/8363/files/network_topology_lecture_notes_pdf.pdf
- https://static.usrfiles.com/ugd/aef5b7_839a4aea39dc401dbb02facb6a6e91ce.pdf
- https://static.usrfiles.com/ugd/b8c837_f1af2c8f66e54d9ba9709ab0571ad208.pdf
- https://static.usrfiles.com/ugd/b8c837_e0cc46f18ff542b3bfe17710fee3003e.pdf
- https://static.usrfiles.com/ugd/856cea_7ac4df176fe8408394108b4ac0e9a668.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_off0000aa44.bin` `afacdce78a1f56fab1b393221a4fd656ff6991bbc8a256edd5fba38643b8cb6c`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xAA44	5208 bytes
`font_01_sfnt_off0000bbe8.bin` `eb854be64fbd08d95326449418464d8bc81bb734031c5a128ee7cb99b99b26a1`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xBBE8	15880 bytes

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