Malicious PDF — malware analysis report

Static analysis result for SHA-256 9945aa25ffdff917…

MALICIOUS

PDF

45.8 KB Created: 2020-10-31 07:03:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 52b9985900de45d2cb1fbd65c419f73e SHA-1: dca14a1af817fdb6e0a25f09baef4eb5ddbdf0a2 SHA-256: 9945aa25ffdff9172588401fc6ac2f1e4ecb917fe29ff1410320f53490393032
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://ttraff.cc/123?keyword=wichita+auto+auction In PDF document text
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/1867598.pdfIn PDF document text
    • https://worozimovazez.weebly.com/uploads/1/3/1/4/131406108/3ed65.pdfIn PDF document text
    • https://fejamelaluboj.weebly.com/uploads/1/3/4/3/134311679/xusotenaxaveda_fenonawojikani_tulelepegedisiv_vipukokikuxame.pdfIn PDF document text
    • https://fogoravirekan.weebly.com/uploads/1/3/4/3/134335139/bozixadagis.pdfIn PDF document text
    • https://nikokitigo.weebly.com/uploads/1/3/4/5/134500207/a61e42.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409606/normal_5f9c33b71392c.pdfIn PDF document text
    • https://pisanofinupu.weebly.com/uploads/1/3/1/4/131437881/8152119.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://cdn.shopify.com/s/files/1/0482/3508/5978/files/real_drift_car_racing_mod_apk_4.1.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a694543-23fa-45bb-99bc-2afb439d2d20/41741061817.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/9254/8030/files/wow_race_height_chart.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/7147/8168/files/oanda_app_for_android.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0493/1403/7919/files/garmin_nuvi_2595lmt_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/19405aa4-2256-450d-9f6d-b0f4c3924070/35215671597.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0508/1753/2101/files/gateway_to_prep.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.

FilenameKindSourceSize
font_00_sfnt_off00006845.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6845 4356 bytes
SHA-256: c94e9c5005868c1f5703eb3d6d6b8b8fb834554358dce2006affc9afe85ab6e0
font_01_sfnt_off00007708.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7708 10780 bytes
SHA-256: 93a6c68676218ac71d85a7cc30d27221d4694b79229a7909d359258dadc06c13
font_02_sfnt_off00009be1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9BE1 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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