Malicious PDF — malware analysis report

Static analysis result for SHA-256 a53909cede29c5fd…

MALICIOUS

PDF

39.4 KB Created: 2020-10-31 10:18:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 57aef590f02dcd912e78d86068ea34a1 SHA-1: 1cc522af07808ebff938dbf14ecebd3e58e85d51 SHA-256: a53909cede29c5fd4d377c60a4d2d1395acd521b18ce468eea6cfc859a9c13b2
154 Risk Score

Malware Insights

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

The PDF contains a link farm designed to mimic search results, directing users to download other PDF files. The primary malicious URL, https://ttraff.me/123?keyword=the+ghost+in+the+machine+arthur+koestler+pdf+download, is flagged as a redirector to malicious infrastructure. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest an attempt to lead users to malicious content, likely for phishing or malware distribution.

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.me/123?keyword=the+ghost+in+the+machine+arthur+koestler+pdf+download
    • https://tedovuja.weebly.com/uploads/1/3/4/4/134465286/biwer_rowetunalomoni_kukufa_zepabegowufu.pdf
    • https://seririgikum.weebly.com/uploads/1/3/0/7/130739922/11604dc7532d10.pdf
    • https://laregupofonel.weebly.com/uploads/1/3/4/4/134464195/toseworofananet_safulux_nonimuwuji.pdf
    • https://fijojonibiw.weebly.com/uploads/1/3/2/6/132681787/9247351.pdf
    • https://vasedowazapen.weebly.com/uploads/1/3/4/3/134320052/xerodaguzimobafimiv.pdf
    • https://nekizinatuzi.weebly.com/uploads/1/3/4/3/134325328/40a5d1959179c11.pdf
    • https://gusumadanu.weebly.com/uploads/1/3/2/6/132695601/8471045.pdf
    • https://fukikabigo.weebly.com/uploads/1/3/4/4/134457586/kezigunuxibi.pdf
    • https://baresifesej.weebly.com/uploads/1/3/4/1/134131831/kegevesotuxijuv.pdf
    • https://dimaxafazeza.weebly.com/uploads/1/3/1/4/131453031/wotukomomig-safozepogadala.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0478/0654/6079/files/roginuzekasiko.pdf
    • https://uploads.strikinglycdn.com/files/03ceb9e1-1c7f-4339-b35f-196a6435226b/pipofujutelevurufut.pdf
    • https://uploads.strikinglycdn.com/files/cc757a23-1f9f-4a4e-a0d8-e121f8118753/86186026640.pdf
    • https://cdn.shopify.com/s/files/1/0481/6637/1495/files/family_feud_party_game_instructions.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_off00005a99.bin
6cf031f3e33a5fd2f1cdc3df8936614b34520d331e200b9390fee64e8acbb122		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A99 5672 bytes
font_01_sfnt_off00006dca.bin
0bd92f6f52fd45ee918e8d3c4b957362bfcf05db373b1ff0e1815633eaf3dcdf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DCA 10120 bytes

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