PDF malware analysis — malicious · dbac00007148af2f

MALICIOUS

PDF

46.3 KB Created: 2020-10-15 09:39:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23

MD5: aa89d2c0c21bee90422b65a78e28fae5 SHA-1: 317d53063368abbc26433d3ac00afa6ed573974a SHA-256: dbac00007148af2f3a1009f1108878f5994d51b460b8439171ae47723faaefcc

184 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document is classified as malicious due to its extensive use of link farms, directing users to numerous external websites. The primary URL identified, 'https://ttraff.club/pify?keyword=dbms+and+rdbms+concepts+pdf', appears to be a redirector, likely leading to further malicious content or SEO spam. The document's structure and the high number of outbound links suggest an attempt to manipulate search engine rankings or distribute unwanted content.

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://ttraff.club/pify?keyword=dbms+and+rdbms+concepts+pdf In PDF document text
- https://paguzijap.weebly.com/uploads/1/3/1/4/131453408/abf5f273dfe2042.pdfIn PDF document text
- https://jawasolasazilem.weebly.com/uploads/1/3/1/3/131379174/d1ee3c84.pdfIn PDF document text
- https://gemenudotipetal.weebly.com/uploads/1/3/2/6/132695720/vetetikosotuzafiwop.pdfIn PDF document text
- https://site-1041286.mozfiles.com/files/1041286/dedupevukibuwujixo.pdfIn PDF document text
- https://site-1039320.mozfiles.com/files/1039320/79704149425.pdfIn PDF document text
- https://site-1043286.mozfiles.com/files/1043286/defosuzekikiwuxuv.pdfIn PDF document text
- https://site-1039320.mozfiles.com/files/1039320/59242933909.pdfIn PDF document text
- https://site-1042633.mozfiles.com/files/1042633/lalidarapagugomijima.pdfIn PDF document text
- https://site-1039783.mozfiles.com/files/1039783/likumu.pdfIn PDF document text
- https://site-1043095.mozfiles.com/files/1043095/5779137615.pdfIn PDF document text
- https://site-1042598.mozfiles.com/files/1042598/32446973729.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4366042/normal_5f87ed5f887ff.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4368218/normal_5f87cf62f2a5d.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4366661/normal_5f87736f8e39d.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4366033/normal_5f8745deb2aa4.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://www.daltonmaag.com/In PDF document text
- https://uploads.strikinglycdn.com/files/f47b4ae7-340c-4347-b23a-44c16e1b7124/popatudajelidawad.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0435/3448/3615/files/google_drive_the_lion_king_2019_full_movie.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0434/1825/5516/files/autodesk_sketchbook_motion_android.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_off000068d8.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x68D8	5148 bytes
SHA-256: `d549e50d254695a7533f195f6ff918f2e9fd043e966a5ae9a8a434034a54e102`
`font_01_sfnt_off00007a22.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7A22	10424 bytes
SHA-256: `7908ad73a30868be91783cdec1dae2bfa18c79ff3892fa9100474f23846c6fcf`
`font_02_sfnt_off00009dbe.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9DBE	4324 bytes
SHA-256: `cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34`

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