Malicious PDF — malware analysis report

Static analysis result for SHA-256 5aed29a0dc1fd15d…

MALICIOUS

PDF

123.1 KB Created: 2020-10-25 17:47:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 268a5d69f7a0a9b99964202ea2d7913b SHA-1: 32b453418045420917f879af96bcc39e5d76a322 SHA-256: 5aed29a0dc1fd15da1936148fcc7f9e0d60cb0861789ad7e60cbfdab976ac376
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, many pointing to what appears to be a link farm designed for SEO poisoning. One critical heuristic identified a link to known malicious redirector infrastructure at 'ggtraff.ru'. The document body, though partially corrupted, contains the URL 'https://ggtraff.ru/aws?keyword=demanda+de+amparo+indirecto+en+materia+familiar+pdf', suggesting a lure to a malicious site disguised as a legal document. The ML classifier also strongly indicated maliciousness.

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://ggtraff.ru/aws?keyword=demanda+de+amparo+indirecto+en+materia+familiar+pdf In PDF document text
    • https://norumevi.weebly.com/uploads/1/3/0/9/130969469/mujadawak-muxitafosuxe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380379/normal_5f8e1b3bceba8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369501/normal_5f8def1225731.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370540/normal_5f8f8872230c8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365606/normal_5f8dfacd23450.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374859/normal_5f950ecce24fb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382004/normal_5f93099078019.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/toliwudalamem/zazewar.pdfIn PDF document text
    • https://s3.amazonaws.com/kopisigapub/93348263564.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/warrior_cats_bramblestar_s_storm.pdfIn PDF document text
    • https://s3.amazonaws.com/ratixifo/ralave.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0494/0464/1436/files/outlook_android_push_notifications_not_working.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6558/0437/files/80461743459.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/2653/3528/files/tekotoleles.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/0550/9271/files/digawipejevif.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9737/5388/files/god_made_me_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/7352/8494/files/plastic_drawer_slides_home_depot.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/9331/0631/files/3883418899.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0493/2360/6175/files/40091441813.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/9005/7647/files/dogati.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_off0001a71a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A71A 5124 bytes
SHA-256: 93f3a775a0d55033fa8a81d1c4c0b726efea43d6200c356d8387bad983ec3870
font_01_sfnt_off0001b86f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B86F 12076 bytes
SHA-256: 7b9e0b658321c57a9102007414b67eddb09284448c3bfb073bd0d62d212ad677

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