Malicious PDF — malware analysis report

Static analysis result for SHA-256 34b259c16294419a…

MALICIOUS

PDF

40.3 KB Created: 2020-08-19 15:40:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2f0f1b792ebaf4c6b409b29ef4c44f68 SHA-1: 427bf7da53a54dd27ebf2ec65d851d1efdde7ec2 SHA-256: 34b259c16294419aec40bc3cf257fbd35999730436d993f06315cd072d122980
152 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1566.002 Spearphishing Attachment

This PDF file contains numerous embedded links, with a critical heuristic firing indicating a malicious redirector. The document body, though partially corrupted, contains text related to 'devexpress report toolbar not working' and a URL pointing to a redirector service. This suggests the document is designed to trick users into clicking malicious links, likely leading to further compromise. The presence of a malicious redirector URL and a link farm indicates a phishing or scam attempt.

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=devexpress+report+toolbar+not+working
    • http://nofubir.candyzcandidz.com/uploads/1/3/1/4/131453494/d15d6f8.pdf
    • http://jibexubu.ministryoflove.me/uploads/1/3/0/7/130739593/6a843.pdf
    • https://cdn.shopify.com/s/files/1/0430/7052/1495/files/25611781500.pdf
    • https://cdn.shopify.com/s/files/1/0434/9113/1557/files/sugekevuvulu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/89573664631.pdf
    • https://cdn.shopify.com/s/files/1/0433/1533/1227/files/6996141468.pdf
    • https://cdn.shopify.com/s/files/1/0430/1537/2953/files/pexefelaxav.pdf
    • https://cdn.shopify.com/s/files/1/0440/6204/8421/files/here_i_am_humbled_by_your_majesty_chords.pdf
    • https://cdn.shopify.com/s/files/1/0432/1932/0992/files/reflex_math_hacks.pdf
    • https://cdn.shopify.com/s/files/1/0440/4045/4294/files/surah_ar_rahman.pdf
    • https://cdn.shopify.com/s/files/1/0433/8155/5350/files/android_textview_bold_not_working.pdf
    • https://cdn.shopify.com/s/files/1/0431/2793/1029/files/turevewoz.pdf
    • https://cdn.shopify.com/s/files/1/0434/8080/9622/files/vovenakavazug.pdf
    • https://cdn.shopify.com/s/files/1/0434/7599/2728/files/37365030056.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000575a.bin
3dd9e8b85bde19ff44aa95b6365b0247992d2e5fb1d10a7bf030af8590012598
pdf-font-stream PDF embedded font (sfnt) at offset 0x575A 5408 bytes
font_01_sfnt_off000069f1.bin
47c66ae06c077e2ca930d1133bdd3712d4b958c238797ca4ba0f143a7d0d67a7
pdf-font-stream PDF embedded font (sfnt) at offset 0x69F1 13040 bytes