Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7a18a03bd126db2…

MALICIOUS

PDF

43.2 KB Created: 2020-10-31 15:39:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aec0d3ea0d8655a80b3193239dcd609c SHA-1: 95d0380e9268989ff60e80946d2663be4391835c SHA-256: a7a18a03bd126db2b6ae58ed8737c308ef4665dc0462eb745ea75d72261efe9e
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to external PDF files, which is characteristic of SEO poisoning or link farm tactics. One of the primary links, https://gettraff.ru/123?keyword=giant+magma+cube+minecraft, is flagged as a malicious redirector. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to drive traffic to malicious infrastructure, potentially as a precursor to further exploitation or phishing.

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=giant+magma+cube+minecraft
    • https://xepuxewezikute.weebly.com/uploads/1/3/4/4/134437058/jabinobip_xosupoko_gumen.pdf
    • https://nosadipopone.weebly.com/uploads/1/3/4/4/134470180/tabusu_diraw_gupukawituwe.pdf
    • https://jivoxafur.weebly.com/uploads/1/3/4/3/134382284/9849c6bce.pdf
    • https://xironudobavus.weebly.com/uploads/1/3/4/4/134461104/bajajudidojujuz_pazus_bopibotamoj.pdf
    • https://letolonenuxe.weebly.com/uploads/1/3/4/0/134095956/ladifukute.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/vufupu/41609053569.pdf
    • https://s3.amazonaws.com/bopuxosavubare/jelovubujewulotofujonifip.pdf
    • https://cdn.shopify.com/s/files/1/0504/9453/7919/files/65384086191.pdf
    • https://s3.amazonaws.com/dorulusof/hydraulic_actuators.pdf
    • https://uploads.strikinglycdn.com/files/0ca3aed2-5f36-494d-9191-efc7b2bdaba0/83203134723.pdf
    • https://s3.amazonaws.com/sugaguxagu/church_of_nigeria_anglican_communion_liturgy.pdf
    • https://uploads.strikinglycdn.com/files/f60cbd22-0aea-4c4a-a50c-650d0922e6bc/30090233209.pdf
    • https://s3.amazonaws.com/zaxuledo/lanorolikovefumuwuvafebe.pdf
    • https://s3.amazonaws.com/fuwenoxuzasila/be_alright_piano_sheet_music.pdf
    • https://s3.amazonaws.com/bofake/army_defence_games_unblocked.pdf
    • https://s3.amazonaws.com/pujinit/83920519947.pdf
    • https://s3.amazonaws.com/bakoloj/characteristics_of_surrealism_in_literature.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000068f3.bin
f7b844f6905dae28cb89bbf5d921f4972ba50aed6765e9065f8d8889c1251ff5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68F3 5160 bytes
font_01_sfnt_off00007a75.bin
715d6fdc751f8a4fdf9364eccd53bb1953d54ce913b8598584affb5e4b5153da		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A75 10928 bytes

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