Malicious PDF — malware analysis report

Static analysis result for SHA-256 7443596083ad852c…

MALICIOUS

PDF

41.9 KB Created: 2020-08-16 18:41:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6f57a439d0e84f6e6f6f4fde135f5cd2 SHA-1: 162b3c69a3ce87dd5dc51d30e027a7926ca7af55 SHA-256: 7443596083ad852c109e4a288320983278acc654af1a36fced4ac407b19df257
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with the primary one redirecting to a known malicious domain. The document body, though heavily obfuscated, contains text related to software downloads, suggesting a lure for users to click the malicious link. The presence of multiple PDF links and a redirector indicates an attempt to distribute further malicious content or phish for information.

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.com/pify?keyword=chemdraw+ultra+free++for+windows+10
    • http://files.palladinohomeinspection.com/uploads/1/3/1/3/131382346/tugazajofox-vedubanaz-fumeruni-vudegul.pdf
    • http://zixute.progressivepb.org/uploads/1/3/0/7/130739232/4040230.pdf
    • http://lunos.andremarquetti.com/uploads/1/3/1/6/131606490/837cd9ec235f03.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0436/8403/6761/files/xetubuvejogem.pdf
    • https://cdn.shopify.com/s/files/1/0434/4374/9029/files/15298563108.pdf
    • https://cdn.shopify.com/s/files/1/0427/8163/8812/files/beastie_boys_ill_communication_songs.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/50751207741.pdf
    • https://cdn.shopify.com/s/files/1/0434/1186/5751/files/swashbuckler_rogue_5e.pdf
    • https://cdn.shopify.com/s/files/1/0435/5850/2563/files/latogetazilab.pdf
    • https://cdn.shopify.com/s/files/1/0428/9026/4742/files/faguporikagudoxadilezawaf.pdf
    • https://cdn.shopify.com/s/files/1/0432/4153/7696/files/tupudevodokumutodisokixa.pdf
    • https://cdn.shopify.com/s/files/1/0450/1933/2766/files/kakuri.pdf
    • https://cdn.shopify.com/s/files/1/0435/9028/7517/files/asana_pranayama_mudra_bandha_bihar_school_of_yoga.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004f52.bin
b11c69378d57c197aa667aa03a024bcd0809a86d78fc5ef9d5f956cd7364bb33		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4F52 5340 bytes
font_01_sfnt_off00006161.bin
daad3f347a4f42f432ee9983e619a7c063e36761dba5934b469418034847e28e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6161 1800 bytes
font_02_sfnt_off000069ef.bin
4d3baab37d67a8e6e593457592a67eed81342ce7dc713b642427ddc3b72da09a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69EF 10100 bytes
font_03_sfnt_off00008c8e.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8C8E 4324 bytes

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