Malicious PDF — malware analysis report

Static analysis result for SHA-256 09d773888721feaf…

MALICIOUS

PDF

37.9 KB Created: 2020-08-27 22:05:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7e2c7e7d4d471c2192af0dde3597ea13 SHA-1: e0e793ac87fabe01fb3ff962e318b540c11b4713 SHA-256: 09d773888721feafa7a9dd1f739f3f5869ec6ad92f8ce547ac3e7fc1ecb2bc22
154 Risk Score

Malware Insights

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

The PDF document contains a lure for a book download, which upon inspection, redirects to a malicious URL. The PDF is flagged as a malicious redirector and a link farm, indicating an attempt to distribute malware or phish for information. The embedded URLs and the document's structure suggest it's designed to trick users into visiting malicious infrastructure.

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/pify?keyword=de+cero+a+uno+libro+pdf
    • http://pazag.yogadkan.com/uploads/1/3/2/8/132816165/4362784.pdf
    • http://wajexuge.iantheresaswonderfullife.com/uploads/1/3/1/4/131438268/zegogavizeba.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0431/4539/6384/files/mixidif.pdf
    • https://cdn.shopify.com/s/files/1/0428/2351/6323/files/dilupubiwaz.pdf
    • https://cdn.shopify.com/s/files/1/0436/1935/2740/files/mitos_sobre_el_alcoholismo.pdf
    • https://cdn.shopify.com/s/files/1/0435/9543/2099/files/agreement_on_safeguards_wto.pdf
    • https://cdn.shopify.com/s/files/1/0463/5118/8130/files/social_issues_and_the_environment.pdf
    • https://cdn.shopify.com/s/files/1/0430/9699/8048/files/26720033002.pdf
    • https://cdn.shopify.com/s/files/1/0432/5372/7387/files/apj_abdul_kalam_speech_on_education.pdf
    • https://cdn.shopify.com/s/files/1/0440/5110/3894/files/gegetivujusurom.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004a11.bin
2cade8ca7e5e62be886bd6f518885b3d84773d4e3d755212cf02c855033487e0
pdf-font-stream PDF embedded font (sfnt) at offset 0x4A11 4912 bytes
font_01_sfnt_off00005abd.bin
75d5a44a83380aea0b05aef36631e503f926bd6d4fb359fc64736fdd1040d6e3
pdf-font-stream PDF embedded font (sfnt) at offset 0x5ABD 10708 bytes
font_02_sfnt_off00007d12.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34
pdf-font-stream PDF embedded font (sfnt) at offset 0x7D12 4324 bytes