Malicious PDF — malware analysis report

Static analysis result for SHA-256 5eb3e87f6cbcfbef…

MALICIOUS

PDF

42.9 KB Created: 2020-08-20 23:58:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c2a7ee939ad528141a41bd6b0b1290b3 SHA-1: 22c0515e353b53a0753633740235a7b2f02a67fe SHA-256: 5eb3e87f6cbcfbef6cd50ecc05ab9bdbcceb1dde407d4aa0be8f87ec1eccbc05
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of embedded links, many of which point to external resources, and one specific link is identified as a malicious redirector. The document body, though partially corrupted, suggests a lure related to a "cheat sheet" to entice users to click on these links. The presence of a malicious redirector indicates an attempt to lead the user to a harmful site, 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.cc/pify?keyword=cricut+easypress+2+setting+cheat+sheet
    • http://files.industryumc.org/uploads/1/3/1/4/131437312/2714816.pdf
    • http://bakuwi.apneaodyssey.com/uploads/1/3/0/7/130740450/6193149.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/5539/0630/files/lovitalunow.pdf
    • https://cdn.shopify.com/s/files/1/0429/7093/9541/files/fuse_voltage_drop_chart.pdf
    • https://cdn.shopify.com/s/files/1/0434/6127/9896/files/tigomi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0097/8853/files/vertical_centrifugal_casting.pdf
    • https://cdn.shopify.com/s/files/1/0451/9664/0407/files/residence_certificate_format.pdf
    • https://cdn.shopify.com/s/files/1/0430/7448/6421/files/30426652348.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/19836568605.pdf
    • https://cdn.shopify.com/s/files/1/0437/5199/7592/files/subject_and_predicate_sentence.pdf
    • https://cdn.shopify.com/s/files/1/0434/3506/5505/files/kusekidodazeradopedofub.pdf
    • https://cdn.shopify.com/s/files/1/0438/5108/8032/files/project_manager_roles_and_responsibilities_in_construction.pdf
    • https://cdn.shopify.com/s/files/1/0437/5746/9845/files/federavamomov.pdf
    • https://cdn.shopify.com/s/files/1/0432/5559/5172/files/psychological_conflict_theory.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_off00006813.bin
be7d6e7d393a2979f16b292bd6957a5a81ccc66598396eb5c0d6c1a4b01d4f3f
pdf-font-stream PDF embedded font (sfnt) at offset 0x6813 5304 bytes
font_01_sfnt_off00007a1f.bin
5cb36f7632136b4188bfb11967f9464535a926614c2d1b934915d6bd3609bcaa
pdf-font-stream PDF embedded font (sfnt) at offset 0x7A1F 10572 bytes