PDF malware analysis — malicious · 458f94424f0cacbf

MALICIOUS

PDF

43.3 KB Created: 2020-08-22 02:28:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 2e2d14aab023c843f2d8fe3075cc9d53 SHA-1: 3ba85c57efd41ee0d24491c22275520e33b0af42 SHA-256: 458f94424f0cacbfb867c2bfa0022ae397dd0658a0d81e97eae4a0cfe99eae27

152 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector at 'https://ttraff.com/pify?keyword=gate+2018+question+paper+ece'. The document body, though heavily obfuscated, contains this URL and references to 'Gate 2018 question paper ece', suggesting a lure to download further malicious content. 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/pify?keyword=gate+2018+question+paper+ece
- http://files.writeproject.org/uploads/1/3/2/3/132303035/a4717b487c2.pdf
- https://cdn.shopify.com/s/files/1/0434/3191/9765/files/jofivefawotowejopigemiri.pdf
- https://cdn.shopify.com/s/files/1/0433/7532/9441/files/babuzusegaboveparet.pdf
- https://cdn.shopify.com/s/files/1/0434/6714/5366/files/53302970345.pdf
- https://cdn.shopify.com/s/files/1/0440/1948/2774/files/xarujosigumidavupos.pdf
- https://cdn.shopify.com/s/files/1/0429/3692/6374/files/naxubakukogodi.pdf
- https://cdn.shopify.com/s/files/1/0428/7820/6111/files/29266678370.pdf
- https://cdn.shopify.com/s/files/1/0438/6557/1493/files/77514712856.pdf
- https://cdn.shopify.com/s/files/1/0433/6448/3240/files/28020845362.pdf
- https://cdn.shopify.com/s/files/1/0433/9879/1329/files/92849979310.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_off00005983.bin` `0eac1552a6a0cc8d6d43e14f5c157d052ff2bf21460314f67a2c213e0a454e63`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5983	6744 bytes
`font_01_sfnt_off00006a6a.bin` `5674779d788f07550d53de97d21b8572cb8e15a438343dbb6be212bb8ff905fa`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6A6A	5572 bytes
`font_02_sfnt_off00007d7b.bin` `4ba54cea67aba4a1d27738c2ce7cc644cd04da2ebf0aa6c2ccec12383693539c`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7D7B	10324 bytes

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