Malicious PDF — malware analysis report

Static analysis result for SHA-256 08e8388450181a39…

MALICIOUS

PDF

49.8 KB Created: 2020-07-20 20:21:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 23577a25315d0d7fe224850838151d8f SHA-1: 4337395a81fff6ea629e79d7122a6f90bc769c49 SHA-256: 08e8388450181a39381ec09919b382adcb1f1fd585ddb1d4016fff0fcb880259
154 Risk Score

Malware Insights

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

The PDF file contains numerous links, with one prominent URL leading to a known malicious redirector. The document body, though heavily obfuscated, appears to be a lure related to accounting exercises, suggesting a phishing or scam attempt. The presence of embedded URLs and the ML classifier's high confidence score indicate malicious intent, likely to redirect users to further malicious content.

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=contabilidade+debito+e+credito+exercicios+resolvidos+pdf
    • http://files.equisportphoto.com/uploads/1/3/1/6/131607662/javeponedeve-lukavadi-jizilez-tapom.pdf
    • http://files.allcaptainsmobilemarine.com/uploads/1/3/2/3/132302916/4334583.pdf
    • http://files.aaronhunttheatre.com/uploads/1/3/0/9/130969191/99a91951ea3d.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0436/3298/4222/files/pojeporokirejex.pdf
    • https://cdn.shopify.com/s/files/1/0432/8924/7894/files/7007620849.pdf
    • https://cdn.shopify.com/s/files/1/0433/8139/1514/files/98290178049.pdf
    • https://zafudax.files.wordpress.com/2020/07/zemeluk.pdf
    • https://fobitogoxonu.files.wordpress.com/2020/06/rasotepize.pdf
    • https://zabukutevil.files.wordpress.com/2020/06/12023155486.pdf
    • https://woxujobeza.files.wordpress.com/2020/06/15461589999.pdf
    • https://cdn.shopify.com/s/files/1/0435/7786/8443/files/nudisamemaxo.pdf
    • https://cdn.shopify.com/s/files/1/0434/0465/6790/files/16654269862.pdf
    • https://cdn.shopify.com/s/files/1/0432/4121/0011/files/14990138099.pdf
    • https://cdn.shopify.com/s/files/1/0428/3426/4231/files/49443971347.pdf
    • https://cdn.shopify.com/s/files/1/0434/7474/7545/files/17108065799.pdf
    • https://cdn.shopify.com/s/files/1/0434/6953/7432/files/wemak.pdf
    • https://cdn.shopify.com/s/files/1/0433/0071/6694/files/73863207972.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_off00007cdd.bin
093ba91436c9c8ce21fbd634d32980cfe1732e8cd85ee8436e30b0c32a459b4c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7CDD 5228 bytes
font_01_sfnt_off00008eae.bin
172a8e9e6dd3d395c0db0d74cff1b889540d276bc1f740b2ced7735b4e63eb1a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8EAE 13480 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.