PDF malware analysis — malicious · a078add9d946d1d0

MALICIOUS

PDF

45.7 KB Created: 2020-08-02 16:06:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: b5de44fb823a092f83ddb162a31c65b5 SHA-1: 0ac8f8566f23aa5cd9a39bc6390e3c16124de4c4 SHA-256: a078add9d946d1d0e68d8af2a1904ddf3efe93755a1091666c238ec3d03de069

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links, a common technique for SEO poisoning or link farms. One of these links, https://ttraff.com/pify?keyword=kagerou+theme+overlay, is identified as a malicious redirector. The ML classifier also strongly indicated maliciousness. The document body is heavily obfuscated and contains what appears to be junk data, but the presence of the malicious redirector URL is the primary indicator of malicious intent.

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.com/pify?keyword=kagerou+theme+overlay
- http://files.frenellesangalang.com/uploads/1/3/2/8/132814241/jijukonotusofaza.pdf
- http://files.the59edsel.com/uploads/1/3/1/3/131378990/gavutuvejune.pdf
- http://files.mcclainmatthewsinsurance.com/uploads/1/3/1/4/131409090/7232005.pdf
- https://cdn.shopify.com/s/files/1/0439/8841/8718/files/gefunik.pdf
- https://cdn.shopify.com/s/files/1/0438/2123/6381/files/52145066313.pdf
- https://cdn.shopify.com/s/files/1/0438/0426/2561/files/zemazovosawo.pdf
- https://cdn.shopify.com/s/files/1/0432/6113/2968/files/74795272981.pdf
- https://cdn.shopify.com/s/files/1/0430/1396/3939/files/64669264923.pdf
- https://cdn.shopify.com/s/files/1/0429/5681/6540/files/juwusabovisurowevateneg.pdf
- https://cdn.shopify.com/s/files/1/0431/2439/2087/files/kafejalumitazinobox.pdf
- https://cdn.shopify.com/s/files/1/0432/6224/7080/files/40090550420.pdf
- https://cdn.shopify.com/s/files/1/0434/6360/6429/files/craigslist_ie_jobs.pdf
- https://cdn.shopify.com/s/files/1/0437/7378/8321/files/xuvuzidizokarutim.pdf
- https://cdn.shopify.com/s/files/1/0431/9536/7585/files/26630511910.pdf
- https://cdn.shopify.com/s/files/1/0429/2778/4095/files/1386202600.pdf
- https://cdn.shopify.com/s/files/1/0436/0034/7299/files/96958298590.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_off000060ff.bin` `e9329c6a203aa80b6344fc5ce1f5d5ab5ed81ab6eeab0310a81a0e667221b610`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x60FF	5052 bytes
`font_01_sfnt_off0000721a.bin` `5d04267466d479161fa8b5ec5005200acac6f9fd077469570aceee008476b047`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x721A	10016 bytes
`font_02_sfnt_off00009497.bin` `40362fbc9d771ad4ffebf23d851d0e608cbe5e910bc9c9578be8a04431091e8d`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9497	16084 bytes

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