Malicious PDF — malware analysis report

Static analysis result for SHA-256 547aaa27b8b134dc…

MALICIOUS

PDF

55.9 KB Created: 2020-10-25 05:31:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: b7049a05d806b44722dde1802138bff9 SHA-1: 18ec2a081868c2118a9ecf3d03418a1d3db7c9f5 SHA-256: 547aaa27b8b134dc62f46ceee58a6e0e31a0b9a74e21dc48e16460a3e8e48cb0
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

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/123?keyword=simatic+s7-1200+cpu+1211c+manual In PDF document text
    • https://wubixuduliku.weebly.com/uploads/1/3/4/4/134466255/satukaruzabajeme.pdfIn PDF document text
    • https://pisanofinupu.weebly.com/uploads/1/3/1/4/131437881/vafijemanebubosu.pdfIn PDF document text
    • https://kokexofagisukop.weebly.com/uploads/1/3/2/7/132710589/kivurakuve.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387046/normal_5f8e47ff3f8ef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372371/normal_5f8940919328c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393026/normal_5f94e96647641.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370303/normal_5f9202ca870ad.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/likanutavorolebonat.pdfIn PDF document text
    • https://zizuralozirufu.weebly.com/uploads/1/3/1/4/131483034/soposaxovuj.pdfIn PDF document text
    • https://jilukixewe.weebly.com/uploads/1/3/4/0/134042659/ab06cd8cb4017c6.pdfIn PDF document text
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/mofep.pdfIn PDF document text
    • https://gitokivoj.weebly.com/uploads/1/3/4/3/134316846/giraropexalakizot.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/e438d33d-1198-4692-ade5-ebf5a246f500/sazirubemip.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e95d59a-037d-420b-8294-9ff59b28fa4b/60370487138.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/7481/7693/files/fruit_loops_tutorial.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/2479/6829/files/how_to_find_redstone_dust_in_minecraft.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0488/4080/2469/files/gadise.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/8020/3416/files/boliduzewanaxavegepetu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/4868/0610/files/tugudekifopod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0493/9949/6871/files/netonopakafesu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/1766/6197/files/jaretiwaf.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.

FilenameKindSourceSize
font_00_sfnt_off00009b01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9B01 5524 bytes
SHA-256: 5e7662562d3f53d0fc314f34839acadf738d7d4bbb85529c69127dbc18cdfa92
font_01_sfnt_off0000adc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xADC8 10828 bytes
SHA-256: 87b93eb27b7a14d23583e58401b07f81160380fd1a43bc6038dca9817d142849

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