PDF malware analysis — malicious · a30a30422527cc01

MALICIOUS

PDF

32.8 KB Created: 2020-08-12 14:18:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 06b545452d232f88d03bcb2967e8bb9c SHA-1: 0647ce953774efd09c159e8e08e7d6d93905ef8d SHA-256: a30a30422527cc011443a96a99042aede8ee77340cca6fa36943ed67053cbe90

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, many of which point to Shopify domains, but one critical link directs to a known malicious redirector. The document body, though heavily obfuscated, contains text related to downloading a biochemistry textbook, which serves as a lure. The primary malicious link is https://ttraff.ru/wb?keyword=biochemistry%20stryer%20pdf%20free%20download, which is likely used to redirect the user 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.ru/wb?keyword=biochemistry%20stryer%20pdf%20free%20download
- http://vatudala.ezekiel37ministries.org/uploads/1/3/2/7/132741555/2f0ee2b9f1.pdf
- http://files.sljdivinelyfired.com/uploads/1/3/2/6/132696111/tuzazutoxe.pdf
- http://jupiwip.austin.foodecosystem.org/uploads/1/3/1/0/131070356/panekokasun.pdf
- https://cdn.shopify.com/s/files/1/0436/0188/7396/files/mo_1040_instruction.pdf
- https://cdn.shopify.com/s/files/1/0433/9610/4348/files/bavokoka.pdf
- https://cdn.shopify.com/s/files/1/0433/0687/7080/files/76222514852.pdf
- https://cdn.shopify.com/s/files/1/0434/0016/7589/files/kokenaxazeni.pdf
- https://cdn.shopify.com/s/files/1/0431/8239/1451/files/times_like_these_chords.pdf
- https://cdn.shopify.com/s/files/1/0429/0006/2367/files/amazing_grace_cello_sheet_music.pdf
- https://cdn.shopify.com/s/files/1/0430/4309/4677/files/52088643639.pdf
- https://cdn.shopify.com/s/files/1/0431/1243/1776/files/sumara.pdf
- https://cdn.shopify.com/s/files/1/0434/2821/6983/files/61081159353.pdf
- https://cdn.shopify.com/s/files/1/0431/8593/0389/files/vitewenefuluruz.pdf
- https://cdn.shopify.com/s/files/1/0436/0781/8398/files/wi-_z_form.pdf
- https://cdn.shopify.com/s/files/1/0431/8111/3506/files/scofield_bible.pdf
- https://cdn.shopify.com/s/files/1/0429/9830/0823/files/68432073669.pdf
- https://cdn.shopify.com/s/files/1/0428/9767/0303/files/zuzifa.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_off0000440e.bin` `1d87c34fe32ad917ca3b06db503eb6152e35361824402a0c9f8500e3ee3da2a0`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x440E	5640 bytes
`font_01_sfnt_off00005722.bin` `876d70347977e1ba084484a0c86b556470e5e17af4f97e6405b5bb3cd015d063`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5722	9108 bytes

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