PDF malware analysis — malicious · 50ddfe24f7c05d96

MALICIOUS

PDF

35.3 KB Created: 2020-09-13 16:21:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: e92ff22c35d405643e0008c86848783b SHA-1: 95f14ce6dc01df872063a498c65d74394d4b9ba6 SHA-256: 50ddfe24f7c05d965c4c1e3ab885ca96c549da83e653b105113d8af64813ffa6

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a link to a known malicious redirector, ttraff.club, which is disguised as a Generac owners manual. The document also features a large number of links to PDFs hosted on static.usrfiles.com, suggesting a link farm or SEO poisoning tactic. The ML classifier strongly indicated maliciousness, and the presence of a malicious redirector confirms the intent to lead the user to harmful content.

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=generac+owners+manual+20kw
- https://static.usrfiles.com/ugd/ff68bb_c4c672fd627d414ab3c74deeca3f6d67.pdf
- https://static.usrfiles.com/ugd/f2ef67_2f8558b634074b9aa9b85b7ab9d3dbef.pdf
- https://static.usrfiles.com/ugd/51c472_9a4a401a055d40c98b16bffff4f6c1bd.pdf
- https://static.usrfiles.com/ugd/bf0735_71d2c3b98a094819a425d9fd2dbcb02c.pdf
- https://static.usrfiles.com/ugd/aef5b7_6ded8291f1c94300a9a0bf97a1a74597.pdf
- https://static.usrfiles.com/ugd/b18e4d_da89d2e57e81423a9adc0c1fb511821d.pdf
- https://static.usrfiles.com/ugd/ba3095_3d8c9287bc3b45faa1ee9aab653c0631.pdf
- https://static.usrfiles.com/ugd/359e64_c155226252c24f48862a3e650380c05a.pdf
- https://cdn.shopify.com/s/files/1/0433/0825/3344/files/datasheet_of_led_diode.pdf
- https://cdn.shopify.com/s/files/1/0430/6888/3098/files/78013960399.pdf
- https://cdn.shopify.com/s/files/1/0436/4887/6697/files/pigabomeweg.pdf
- https://cdn.shopify.com/s/files/1/0429/3564/8409/files/34442963192.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_off00004c80.bin` `efb5fe19b98c9a846ae265afd6f065cc5e32627fb88ec2e6edae3c8f4f360098`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x4C80	5408 bytes
`font_01_sfnt_off00005ede.bin` `1bb3b02fe011c5882f61580ed55c41511312205802a71628dac1753a42d7a6a8`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5EDE	9984 bytes

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