PDF malware analysis — malicious · 5296422d89e8f890

MALICIOUS

PDF

39.9 KB Created: 2020-08-30 02:31:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: f76a43b968388a51e511f59343cba1bc SHA-1: 279a186e9df6d312b654ffc7232d280134652aec SHA-256: 5296422d89e8f890fc9a7b4381ccaaa83d1592a65b428fa397313d29e67bcc5f

152 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged as malicious by an ML classifier and contains a critical heuristic indicating it links to a known malicious redirector. The document body, though heavily obfuscated, contains the URL that leads to this redirector, disguised with a seemingly benign keyword. The file also exhibits characteristics of a link farm, with numerous embedded URLs pointing to PDF files, likely intended to manipulate search engine results or distribute further malicious 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.cc/wix?keyword=pilates+ring+exercises+for+seniors
- https://cdn.shopify.com/s/files/1/0431/6109/2250/files/nolosenejafonotisitabolav.pdf
- https://cdn.shopify.com/s/files/1/0437/1644/4315/files/25780718543.pdf
- https://cdn.shopify.com/s/files/1/0428/3197/0460/files/zokefaweleluduxo.pdf
- https://cdn.shopify.com/s/files/1/0438/2382/5053/files/blood_group_a_positive_diet_chart.pdf
- https://cdn.shopify.com/s/files/1/0433/3237/0584/files/gqti_capital_8.pdf
- https://static.usrfiles.com/ugd/bdeb4c_51b2dbe17fed40d7b00512d2e25f8800.pdf
- https://static.usrfiles.com/ugd/9c43ec_28420b980d9f4b2ca801676140a987c2.pdf
- https://static.usrfiles.com/ugd/f65518_9ff4a369b0994331aa09cff82c5c1775.pdf
- https://static.usrfiles.com/ugd/b8c837_e4a94a6ddf6d452cbc41c039b8f8e669.pdf
- https://static.usrfiles.com/ugd/83e24f_ccd6761f74744c23adc8198c901f1ab4.pdf
- https://static.usrfiles.com/ugd/0adedf_108d8ea46acb4e76863ced0f2c505c8d.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_off00005f3a.bin` `4bbee4587e7d0cf8163de53f365e5956964b2eef490cc2bf68a39acfa9e3fac8`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5F3A	5120 bytes
`font_01_sfnt_off000070ae.bin` `0fcaba399d86ce3d46e8bbbab5b424ea6b18a42bd4c55bd602c2a1cb94fc81c6`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x70AE	10084 bytes

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