PDF malware analysis — malicious · 943cb40e54b52ce1

MALICIOUS

PDF

124.2 KB Created: 2020-10-23 09:02:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14

MD5: 180eeb6efe6963ca877436f1c80439ed SHA-1: 4f177c4918ab7d80ca4dc0881539534baf297ea4 SHA-256: 943cb40e54b52ce1e66efd6200021df077e6b857ea4b610ae662a9adad9c71af

184 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous links to external websites, many of which are hosted on disposable domains and appear to be part of a link farm designed to manipulate search engine results. The primary lure is a search query for 'rabindranath tagore poems in bengali pdf', directing users to malicious redirectors like 'https://ggtraff.ru/123?keyword=rabindranath+tagore+poems+in+bengali+pdf'. The ML classifier strongly indicates maliciousness, and the overall structure suggests a phishing or redirection campaign.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 5

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.
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/123?keyword=rabindranath+tagore+poems+in+bengali+pdf In PDF document text
- https://zimiduninu.weebly.com/uploads/1/3/1/6/131637103/6620064.pdfIn PDF document text
- https://naxupezo.weebly.com/uploads/1/3/4/3/134350891/tazuz-susebujawemal.pdfIn PDF document text
- https://juporolo.weebly.com/uploads/1/3/1/3/131380745/6389b1889f52e.pdfIn PDF document text
- https://fulugive.weebly.com/uploads/1/3/0/8/130874350/ruvigilagukid.pdfIn PDF document text
- https://gaxopekel.weebly.com/uploads/1/3/0/9/130969853/tapofopel.pdfIn PDF document text
- https://zulatikuwa.weebly.com/uploads/1/3/0/7/130776211/finuvavubabu_jiwigo_buwun_watik.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4369631/normal_5f88ae6a887bd.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4384159/normal_5f915ec579df3.pdfIn PDF document text
- https://kutenamig.weebly.com/uploads/1/3/0/7/130740069/rabuj.pdfIn PDF document text
- https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/665612.pdfIn PDF document text
- https://vilukenuxe.weebly.com/uploads/1/3/2/8/132814007/8b0498.pdfIn PDF document text
- https://lodirunesu.weebly.com/uploads/1/3/0/8/130874391/zonufuju.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/1/0428/2230/3900/files/vodafone_mobile_bill_sample.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0485/0715/8690/files/skyrim_special_edition_memory_patch.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/e337619a-661b-4349-8491-0469738a8de9/26278129258.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/2bfc6152-5934-40c2-b7fe-b6ef6ec16e8d/principle_of_foundation_engineering.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
- http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
- http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00016c02.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x16C02	5600 bytes
SHA-256: `ac64c9a60d4e0ccef1e89648a1345bedbe338d71d549cb2e98693b4d73ca4d36`
`font_01_sfnt_off00017ed6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x17ED6	13684 bytes
SHA-256: `41d2dd1e4ef6e04ea5e808192cb28ae3e26c92b131fc18e2f4f347943ec70059`
`font_02_sfnt_off0001a999.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1A999	19048 bytes
SHA-256: `12249245ecaff5bc9dbddb8a33829e31d43901366ed6a0d6deeb93b2df9a3d1b`

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