Malicious PDF — malware analysis report

Static analysis result for SHA-256 319c09def970bb49…

MALICIOUS

PDF

56.0 KB Created: 2020-10-28 15:40:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 55d6d6606c43ed66106ec5fd220e6077 SHA-1: d55cf929f78dbaeb430b1664026498d7a85ee45b SHA-256: 319c09def970bb49cf10c9a4b94fcda1018e96c45eef2289256e2559b38c901d
154 Risk Score

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 0.9999

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=how+to+find+enderman+bedrock In PDF document text
    • https://savakorudefipe.weebly.com/uploads/1/3/2/3/132303238/1791736.pdfIn PDF document text
    • https://givifajilodox.weebly.com/uploads/1/3/0/8/130874655/dawisuru_letinili.pdfIn PDF document text
    • https://jarapitoxedomel.weebly.com/uploads/1/3/1/4/131437170/4702777.pdfIn PDF document text
    • https://lifotuvuzaraxur.weebly.com/uploads/1/3/0/7/130775275/71d7b90.pdfIn PDF document text
    • https://kuwofepex.weebly.com/uploads/1/3/2/7/132740654/diruxurom.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/1/0438/3100/1238/files/to_kill_a_mockingbird_reading_packet.pdfIn PDF document text
    • https://s3.amazonaws.com/nitajosasa/dupigolasejaxutetebogu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8987/7405/files/zutozumivijajekijos.pdfIn PDF document text
    • https://s3.amazonaws.com/tojabixefova/a_million_years_ago_sheet_music.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5670/1346/files/download_boxing_star_mod_apk_android_1.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/2341/4942/files/wopifuxopubivujilurekosus.pdfIn PDF document text
    • https://s3.amazonaws.com/gupawupigawono/bragi_dash_user_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7007/0687/files/sentence_transformation_b1.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/32129388504.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8204/5853/files/pontiac_400_engine_for_sale_forums.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/90197321790.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/6636/6363/files/smith_and_wesson_22a_feeding_problems.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/5673/2591/files/jumibirusivavudixilikas.pdfIn PDF document text
    • https://s3.amazonaws.com/befevifa/be_more_chill_squip_actor.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/2973/1777/files/88606385866.pdfIn PDF document text
    • https://s3.amazonaws.com/lefemijip/sherlock_holmes_kitaplar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/3284/1887/files/kupepabin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/4803/8311/files/tokoderusapekexuziwipawu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/5298/5251/files/sample_commercial_invoice.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_off00008c56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C56 5000 bytes
SHA-256: 726dc1295553844940fdf84d2e3ef13966e5d41447b718fb43c1c5dde1bdca03
font_01_sfnt_off00009d4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9D4A 11412 bytes
SHA-256: 4f34995dac9aa190e5f355989ba4526976a11eecb7dc4b152e3f302cf64b85e0
font_02_sfnt_off0000c411.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC411 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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