PDF malware analysis — malicious · a1d770059bfaee2a

MALICIOUS

PDF

40.4 KB Created: 2020-09-01 12:44:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 13414943ceccaac47d24ef089f2b0e3b SHA-1: 23d9d31f0baf2923c7aa168419052dbf7a7daecb SHA-256: a1d770059bfaee2a2525bc99b357234a0150aee32dddefcfb8cd044878aba57c

152 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a critical heuristic firing for a malicious redirector link, specifically pointing to a URL related to 'play store apk mod hack'. This indicates a social engineering attempt to trick users into downloading potentially harmful software. The file also exhibits characteristics of a link farm, with numerous embedded URLs, many pointing to static.usrfiles.com, suggesting an attempt to obscure the final malicious destination. No scripts were extracted from this sample.

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.link/wix?keyword=play+store+apk+mod+hack
- https://static.usrfiles.com/ugd/3e87bf_bd6393a395974ba3b172222755fffb53.pdf
- https://static.usrfiles.com/ugd/5a1791_7ea3a91c9e2146249edb0e01182acee8.pdf
- https://static.usrfiles.com/ugd/b8c837_5c9f39ed0de14c4eb5c44c0f4445f9c1.pdf
- https://static.usrfiles.com/ugd/b50c55_4ab1ceeb815e4839916f0209c7c20fdd.pdf
- https://cdn.shopify.com/s/files/1/0434/3755/5864/files/zelupixuto.pdf
- https://cdn.shopify.com/s/files/1/0437/4760/6679/files/all_the_things_addon.pdf
- https://cdn.shopify.com/s/files/1/0428/1401/3606/files/davisid.pdf
- https://cdn.shopify.com/s/files/1/0468/9939/6768/files/wobojazewevijifer.pdf
- https://static.usrfiles.com/ugd/9ff9b8_ab039988706a4eb4a1cfa8521d8f4479.pdf
- https://static.usrfiles.com/ugd/b8c837_c24c944a9cb046c1acfeb53a213222cb.pdf
- https://static.usrfiles.com/ugd/590778_e6422b350f774a87bfa2ba042fabc255.pdf
- https://static.usrfiles.com/ugd/bf0735_c6fa111efcd64ae5bd341a9e1e647e99.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_off00005e04.bin` `dba7de60cd79617155592f8dbf0ea4df38818f1c4f9dd6a9a6e6e789d88dbc59`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5E04	5480 bytes
`font_01_sfnt_off00007085.bin` `68f42d425fbec3e91d975c5d6bb8376632b99c34ce678d48375b1febd9db6a59`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7085	10768 bytes

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