PDF malware analysis — malicious · 680cc20bbaa1bd81

MALICIOUS

PDF

40.3 KB Created: 2020-08-30 02:32:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 02f9f4743b0db7077a0330695c530381 SHA-1: 7aa801b85d7031d13fdb7eae691955b9ac184a7d SHA-256: 680cc20bbaa1bd81808ef9a1eafe1df70e50d8aa33dd663df9499049b8f7ce87

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links, one of which, 'https://ttraff.club/wix?keyword=python+crash+course+book+pdf+free+download', is flagged as a malicious redirector. The document body, though heavily obfuscated, contains text suggesting a lure for a 'Python crash course book pdf free download', aligning with a phishing or scam attempt. The presence of numerous external PDF links further supports a link farm or SEO manipulation tactic.

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.club/wix?keyword=python+crash+course+book+pdf+free+download
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://static.usrfiles.com/ugd/b8c837_8eb3c54016d04d24ab1ab29580d5a40b.pdf
- https://static.usrfiles.com/ugd/73cb9e_c4b34d4fd32b4d8cabcfe9114a8d87f7.pdf
- https://static.usrfiles.com/ugd/b8c837_f8d12838077847a99950e74cb370d10e.pdf
- https://cdn.shopify.com/s/files/1/0434/0498/4483/files/larulapizixujegikedam.pdf
- https://cdn.shopify.com/s/files/1/0430/1740/4573/files/55672098506.pdf
- https://cdn.shopify.com/s/files/1/0428/1883/0492/files/kamasutra_20_posiciones.pdf
- https://static.usrfiles.com/ugd/b8c837_6be1c08ab6f04fba8c62b1b55f411067.pdf
- https://static.usrfiles.com/ugd/b8c837_f78db367348d404b9851ec2f9eee442f.pdf
- https://cdn.shopify.com/s/files/1/0437/6517/0334/files/togugaru.pdf
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/pelezegagujagemubejapo.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/
- http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00005af7.bin` `74f4395b15fd97a1ad7c15f305c125911a0cf68059f98d90b49fc80beefb3460`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5AF7	5640 bytes
`font_01_sfnt_off00006e27.bin` `fb150e9f59437ce72e7bf73c59add8b7409d1fea1e379e8616a0a62053afa382`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6E27	11848 bytes

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