PDF malware analysis — malicious · 19b77273785bdeec

MALICIOUS

PDF

40.8 KB Created: 2020-09-02 06:32:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 9f760976d71938b0c73f39bcbb27d4cd SHA-1: 1cbbecd26933e3f5979a43bb136b6561c03065d2 SHA-256: 19b77273785bdeec80753be6b941c4d8830a81bcd8970d6850fb05b864052e9e

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links, one of which points to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'consumer reports laptops 2017' and a URL that appears to be a lure. The presence of numerous external PDF links suggests a link farm or SEO poisoning attempt. No scripts were extracted, but the malicious redirector indicates a phishing or scam attempt.

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.me/pify?keyword=consumer+reports+laptops+2017
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://cdn.shopify.com/s/files/1/0458/5488/3993/files/suwudeb.pdf
- https://cdn.shopify.com/s/files/1/0432/5516/9182/files/vafanab.pdf
- https://cdn.shopify.com/s/files/1/0430/9899/6889/files/79685735013.pdf
- https://static.usrfiles.com/ugd/5d2cf3_8dd8a87a9ca347c0a6ecbeef01651900.pdf
- https://static.usrfiles.com/ugd/a838c0_7403564dd83c43e289b14c2a78089be6.pdf
- https://static.usrfiles.com/ugd/e2c6c1_015b83cbd753419d9c09a0be9d276ac8.pdf
- https://static.usrfiles.com/ugd/696117_f3d7d6b12dfb4f17a25d4f0b98b9c12a.pdf
- https://static.usrfiles.com/ugd/b4f0c6_afba2f994832472f8092a2608d8d67f3.pdf
- https://static.usrfiles.com/ugd/b8c837_6ad2c6d186d241708bee8ee9f35fc233.pdf
- https://static.usrfiles.com/ugd/d55797_b38609bd55e244f98cf89e7838396179.pdf
- https://static.usrfiles.com/ugd/b7306e_90de7d7047154f449dc0b263d4bda54e.pdf
- https://static.usrfiles.com/ugd/55e2c6_70e0613853184efb8335f1203f19d07d.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_off0000616b.bin` `0c5f4f4dd143ca366fb08cbde3bfdb69877688fe038f0421f216cb69c8a1c638`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x616B	5276 bytes
`font_01_sfnt_off00007345.bin` `3a543f4f9e617079b391c43c7ac6f35a9796dc014da6ae3ce6b4f1b249e28820`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7345	10316 bytes

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