PDF malware analysis — malicious · 627371fd456795d8

MALICIOUS

PDF

51.9 KB Created: 2020-10-14 01:49:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23

MD5: a4105e34c04359d7af30399121eb2daa SHA-1: be068a56c1e1c0c1f8c9a7373a9771e2afb32366 SHA-256: 627371fd456795d8d2ab1992524afd3ab8a64d5917bad35d3073b735217ab02a

124 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains multiple embedded URLs, with a primary link pointing to a known malicious redirector. The document body, though heavily obfuscated, includes text related to downloading software and references to URLs that are part of a link farm hosted on disposable domains. This suggests the file is designed to redirect users to malicious or unwanted content.

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM

Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
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://ggtraff.ru/strik?keyword=watchmaker+premium+apk+free+download In PDF document text
- https://fodezamu.weebly.com/uploads/1/3/1/4/131407453/devuxupujikeninaferi.pdfIn PDF document text
- https://fijojonibiw.weebly.com/uploads/1/3/2/6/132681787/kizerapu.pdfIn PDF document text
- https://zafozudakajadev.weebly.com/uploads/1/3/0/8/130814863/kuwekewugi.pdfIn PDF document text
- https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/tadib-pepalitegugoj.pdfIn PDF document text
- https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/zutilipevozafeguwu.pdfIn PDF document text
- https://site-1043321.mozfiles.com/files/1043321/27656124055.pdfIn PDF document text
- https://site-1038739.mozfiles.com/files/1038739/81342491207.pdfIn PDF document text
- https://site-1040892.mozfiles.com/files/1040892/59322346149.pdfIn PDF document text
- https://site-1039907.mozfiles.com/files/1039907/37217411209.pdfIn PDF document text
- https://site-1039341.mozfiles.com/files/1039341/bazitasoruzopagagup.pdfIn PDF document text
- https://site-1043123.mozfiles.com/files/1043123/92625600478.pdfIn PDF document text
- https://site-1039895.mozfiles.com/files/1039895/katoxuwigogijotolufaboxa.pdfIn PDF document text
- https://site-1039897.mozfiles.com/files/1039897/15687419127.pdfIn PDF document text
- https://site-1037844.mozfiles.com/files/1037844/23835541258.pdfIn PDF document text
- https://site-1039509.mozfiles.com/files/1039509/suxexapol.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://cdn.shopify.com/s/files/1/0429/6297/6921/files/ada_dental_code_for_valplast_partial.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0483/3548/7129/files/supervision_in_social_work_by_alfred_kadushin_daniel_harkness.pdfIn PDF document text
- http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
- http://purl.org/dc/elements/1.1/In PDF document text
- http://ns.adobe.com/pdf/1.3/In PDF document text
- http://ns.adobe.com/xap/1.0/In PDF document text
- http://ns.adobe.com/xap/1.0/mm/In PDF document text
- http://ns.adobe.com/xap/1.0/rights/In PDF document text
- http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00007d4d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7D4D	3868 bytes
SHA-256: `04c6a104cc8af62656df6a5a36f2789dad27c62db1339e931acb25152a7cc774`
`font_01_sfnt_off00008b11.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8B11	5384 bytes
SHA-256: `8adb91326de99ef1f0a9b257d73b28650523a50f9fdc25848a233696fffc1a9e`
`font_02_sfnt_off00009d53.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9D53	10624 bytes
SHA-256: `62ab2e23c0777bac3a5f67dc57194bd9153bb16873b3645387e8ef17276fb788`

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