PDF malware analysis — malicious · 5170e31aa8816677

MALICIOUS

PDF

99.5 KB Created: 2020-08-25 10:42:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 170e324df0550878a3a3e60d7bcc873f SHA-1: 0ee492ac53368c19cf8dbd04c4d44cea2adba5c2 SHA-256: 5170e31aa88166771a3a5bdb1e10a8cfb44e8ac4454e884644d1d64fa4ba4eee

152 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains the URL 'https://ttraff.com/pify?keyword=java+8.+51+version', suggesting a lure related to Java. The presence of a large number of external PDF links, many hosted on Shopify, indicates a link farm strategy. The ML classifier also strongly flagged this PDF as malicious.

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/pify?keyword=java+8.+51+version
- http://sitexada.pathwaystoinclusiveeducation.com/uploads/1/3/1/4/131437919/fugeluvenigova.pdf
- http://gedix.toledopresbyterian.com/uploads/1/3/1/4/131409236/7573600.pdf
- http://files.gunmess.com/uploads/1/3/1/4/131452821/mijonodoselejow.pdf
- https://cdn.shopify.com/s/files/1/0435/4467/4455/files/14009111350.pdf
- https://cdn.shopify.com/s/files/1/0428/0814/8127/files/xarorowenewuv.pdf
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mujunevuduw.pdf
- https://cdn.shopify.com/s/files/1/0432/9917/6612/files/waxodukilazoriledan.pdf
- https://cdn.shopify.com/s/files/1/0433/9774/2750/files/46150312752.pdf
- https://cdn.shopify.com/s/files/1/0429/6422/2101/files/boduximopit.pdf
- https://cdn.shopify.com/s/files/1/0463/2379/4077/files/division_worksheets_with_grids.pdf
- https://cdn.shopify.com/s/files/1/0434/6901/3144/files/59351458737.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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off000137de.bin` `e8245c9685481934739578d53d4f161b3b5e9668442352549157ff5a6baf776d`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x137DE	4804 bytes
`font_01_sfnt_off0001483b.bin` `a75f72ec35318e4959ef6355301c40387c72ef2c6098c1948d55bc773caa88e1`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1483B	13148 bytes
`font_02_sfnt_off0001729f.bin` `a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1729F	4324 bytes

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