PDF malware analysis — malicious · 356a73c92ef67bdc

MALICIOUS

PDF

47.2 KB Created: 2020-10-27 14:20:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14

MD5: af9a12e7df040f7bda808baff8e2a3df SHA-1: 9f6f1dca8ab194d791db780bf577bcbb2545dcfb SHA-256: 356a73c92ef67bdcfa4974d9d8b84be922ff7ca6b9d5f8b478a9fd7a3638e709

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link that redirects to known malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains the same URL. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs pointing to various PDF files, likely for SEO manipulation or to host further malicious content. The ML classifier strongly flagged this PDF as malicious.

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://gettraff.ru/strik?keyword=protein+losing+nephropathy+in+dogs+vca In PDF document text
- https://ziripovopibew.weebly.com/uploads/1/3/0/8/130874468/3670096.pdfIn PDF document text
- https://rirumuzog.weebly.com/uploads/1/3/4/1/134109041/fibagabu.pdfIn PDF document text
- https://dujenavu.weebly.com/uploads/1/3/4/3/134366251/5596860.pdfIn PDF document text
- https://fulipevaxavu.weebly.com/uploads/1/3/2/6/132695351/5359598.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/1/0504/4142/0979/files/python_cookbook_3rd_download.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0434/2707/0104/files/signal_transduction_pathways_in_plants.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0431/8950/2111/files/doxijibedajekenawajowu.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/0959679d-83f3-47ef-9fce-786274ecb3eb/14726345954.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/6dac4bdc-7e44-4051-8fa5-f7725d222fa4/resumo_da_infncia_recuperada_de_fer.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/87893971-31bd-4f3f-9593-6a169aa1b08e/65913469321.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/644ba086-c40c-4353-9122-e698d33af906/vobotexuno.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/8f64609a-29ab-4003-ae91-a9fc19a45f9a/kidisunewositinugime.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0482/9033/2836/files/power_cooker_plus_manual_ppc780p.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0484/3064/5416/files/long_island_voters_guide_2020.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0503/3879/1582/files/dream_girl_movie_mp3_song_download_wapking.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/991b3247-b068-4b49-86fe-444b3e464be8/doxudawutotusijagofubid.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/575a8140-86c9-415a-8748-8ac2d78c3a3e/5310323591.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/72711dcb-a8ab-4c53-ae8f-5904b966015f/24_hour_check_cashing_new_orleans.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/ee26b4b2-2914-4679-aa72-310015371bc7/veduladonirinetevafume.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0496/6363/9703/files/avid_one_pager_template.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0428/5690/6911/files/fallout_3_weaponsmith.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0436/1843/5229/files/lutuzujesujebinaponudavi.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0486/6945/8582/files/taksonomi_sereh_wangi.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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000782a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x782A	5496 bytes
SHA-256: `6710b334969f1e2117e2a36ce6fc3a72e6aa9396a7da28bf85b586896117f5cf`
`font_01_sfnt_off00008ad1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8AD1	10932 bytes
SHA-256: `c5f2d0caa77ea1c30f064f7db1bd8c56b34d98a5566c2d0339d91ffb5db80755`

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