PDF malware analysis — malicious · f13e77371d5f5df2

MALICIOUS

PDF

54.0 KB Created: 2020-08-29 23:56:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: bc2e482a18ffd852a29c8105ed6aadc5 SHA-1: f3d859bb294760e69f0d13054ec4568bf370c594 SHA-256: f13e77371d5f5df28a5791684f8d385a4ae255b3bb3413a2e1014ae3d859edeb

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK, indicating it directs users to malicious infrastructure. It also exhibits PDF_SEO_LINK_FARM behavior, presenting numerous links to other PDFs, likely as a lure. The primary malicious IOC is the redirector URL, which is designed to lead users to further malicious content.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 3

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.
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=operating+systems+internals+and+desi
- https://cdn.shopify.com/s/files/1/0441/2584/7704/files/99067075814.pdf
- https://cdn.shopify.com/s/files/1/0432/8266/1532/files/40635880589.pdf
- https://cdn.shopify.com/s/files/1/0437/7244/4823/files/apple_bug_report_response_time.pdf
- https://cdn.shopify.com/s/files/1/0449/2935/1835/files/einstein_bros_bagels_job_application.pdf
- https://cdn.shopify.com/s/files/1/0431/2255/7082/files/30448042123.pdf
- https://cdn.shopify.com/s/files/1/0432/8180/9563/files/76691364459.pdf
- https://cdn.shopify.com/s/files/1/0432/1142/3902/files/niwaxurarogofavijodowezaz.pdf
- https://cdn.shopify.com/s/files/1/0434/9231/1206/files/i_dreamed_a_dream_glee_sheet_music_pdf.pdf
- https://static.usrfiles.com/ugd/b8c837_1e7ea167dad844d7a45034247fd705cd.pdf
- https://static.usrfiles.com/ugd/b8c837_0b85067cdeb548399a006cf4caf3c6a1.pdf
- https://cdn.shopify.com/s/files/1/0432/8721/6293/files/html_meta_tags.pdf
- https://cdn.shopify.com/s/files/1/0431/9592/4637/files/61226447405.pdf
- https://cdn.shopify.com/s/files/1/0438/4745/0789/files/noredokixe.pdf
- https://cdn.shopify.com/s/files/1/0431/0233/9232/files/definition_of_sensation_in_psychology.pdf
- https://cdn.shopify.com/s/files/1/0430/2661/2378/files/present_perfect_tense_simple_past_tense.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_off00005fb6.bin` `df6f64918604f9c6b8e300b8015e03a845b5cb8b90fdf659f7523b9d44716946`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5FB6	16884 bytes
`font_01_sfnt_off00009580.bin` `4d705974072f18576c92229e8709ba7a68717c020fcd4e13a57890cfcb5bffa8`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9580	5408 bytes
`font_02_sfnt_off0000a7c9.bin` `0fbb7f16aa62b05f222733912dcc9f8232fd0dbbe828002b7c1ca733f85896a7`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xA7C9	10172 bytes

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