Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7c578269550ae66…

MALICIOUS

PDF

39.7 KB Created: 2020-11-03 11:39:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 880e9de40f918ba637ef63704b47d2fa SHA-1: b564340ab9ff08545b636c49319d2bccb65d6c34 SHA-256: c7c578269550ae6674d5c2efb8e513f716a73831d6743057c018c82783afd831
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document contains a large number of embedded links, many of which point to disposable hosting or known redirectors. The primary link, 'https://ttraff.ru/123?keyword=gta+san+andreas+apk+mod+data+revdl', suggests a lure for potentially unwanted software or phishing content. The document's structure and link farm indicate a malicious intent to redirect users to harmful sites.

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.ru/123?keyword=gta+san+andreas+apk+mod+data+revdl In PDF document text
    • https://vixeroniwemeful.weebly.com/uploads/1/3/0/7/130740086/kolofewejuda.pdfIn PDF document text
    • https://nexajatolotol.weebly.com/uploads/1/3/4/3/134308242/6584178.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369919/normal_5f887a4054fa7.pdfIn PDF document text
    • https://bebamewikirebu.weebly.com/uploads/1/3/0/8/130874540/kibujaxalewavu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450046/normal_5f9e4bf158c28.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393511/normal_5f94fb9804586.pdfIn PDF document text
    • https://tibiwurab.weebly.com/uploads/1/3/2/6/132695994/xatem.pdfIn PDF document text
    • https://wopadutizibum.weebly.com/uploads/1/3/4/3/134306931/f5e9377451.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371266/normal_5f94631240814.pdfIn PDF document text
    • https://jijibaduwa.weebly.com/uploads/1/3/4/4/134495912/lowetowabovuzilu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374682/normal_5f8ece8b5023c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/e53b0c71-a9c5-444b-b90f-46b6c15b8895/wukiwilewofevozeson.pdfIn PDF document text
    • https://s3.amazonaws.com/lanowilovuviwib/sezefiwanabisalikuroti.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/56579125904.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b0df58db-0a45-4b5b-915b-c091811cf496/come_screenshot_in_acer_laptop.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005c1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C1D 5260 bytes
SHA-256: b0470aef1a8430d937a78c88f2787eb364847ab33fec47c02b2c4f9a4e226e02
font_01_sfnt_off00006df9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DF9 10520 bytes
SHA-256: 834eebef1d2033188e1c5413f8d8186e82b10374cca901ff0a74379032fb4b17

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