PDF malware analysis — malicious · ccaef9c210835314

MALICIOUS

PDF

41.2 KB Created: 2020-09-03 09:30:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: e019f12f9e7167fc876c5a30f1a59f33 SHA-1: 85397b7e65fb4a27415af6644ce8b89a29fbbe25 SHA-256: ccaef9c2108353144d3408cbe87b4a0f5309a4387a4fec0ee96f5d1d54531ca8

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link to a redirector URL that is associated with malicious activity, and the document body includes a search query that could be used as a lure. The presence of numerous external PDF links, many pointing to Shopify, suggests a link farm or SEO poisoning attempt. The ML classifier also strongly indicated maliciousness.

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/wix?keyword=agario+private+server++android
- https://cdn.shopify.com/s/files/1/0429/8031/1203/files/wavenapukefolu.pdf
- https://cdn.shopify.com/s/files/1/0439/0001/0664/files/basic_english_grammar_for_beginners_free_download.pdf
- https://cdn.shopify.com/s/files/1/0436/3960/3360/files/most_confusing_riddles_with_answers.pdf
- https://cdn.shopify.com/s/files/1/0429/6019/1637/files/nationalism_in_europe_class_10_notes_download.pdf
- https://cdn.shopify.com/s/files/1/0432/6418/0390/files/jafagubetura.pdf
- https://static.usrfiles.com/ugd/bf07b1_5ee8676cfb4948358944efe83a55859a.pdf
- https://static.usrfiles.com/ugd/76156b_3f09cfa1d5fe4a2eae433e256de192e9.pdf
- https://static.usrfiles.com/ugd/b8c837_abe6bba0a8304adcb885ee555a61a8ab.pdf
- https://static.usrfiles.com/ugd/7dd30d_ce85bd79befe43f4bebc91b61c052816.pdf
- https://static.usrfiles.com/ugd/a31856_5a7236442b2541c18a88d0c58df73f31.pdf
- https://static.usrfiles.com/ugd/314c35_afea3b0fb94d43a3923c63ad8b9e810b.pdf
- https://static.usrfiles.com/ugd/3fb742_8b0c0c8997fc404ca68989c00bc7e001.pdf
- https://static.usrfiles.com/ugd/8e66a5_9c795189bd9d40ad979857e7eba05c3f.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_off000062b3.bin` `1e09430012ae0c93df16bd5baac2a348d1ff0a2d52e40219ff2de189ffc6761a`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x62B3	5144 bytes
`font_01_sfnt_off0000744a.bin` `4545f47a6859e424de346d00648e2a03206123dd7d267dd1016f0d4dacd8a30f`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x744A	10512 bytes

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