Malicious PDF — malware analysis report

Static analysis result for SHA-256 0bd506d2b0c4e113…

MALICIOUS

PDF

48.6 KB Created: 2020-09-05 03:09:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a3df57592f4151c52b90b7925f2708a6 SHA-1: f8e5c7a90ac6657b15b6a4952aacd5fb48877b30 SHA-256: 0bd506d2b0c4e113c87df8422dca0b117d832c3ad9d41bfe8b4975c7c477ba7f
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to a known malicious redirector, which is likely intended to lead the user to a phishing or malware distribution site. The document body, though heavily obfuscated, contains the target URL and appears to be a lure for a product manual. The presence of a large number of external links, many pointing to benign PDF files, suggests a link farm or SEO manipulation tactic to increase visibility.

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.me/pify?keyword=jawbone+jambox+bluetooth+speaker+manual
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8bbd7_68ed2aea30d04a77993219fb573c7c8d.pdf
    • https://static.usrfiles.com/ugd/f91cf1_12e7fc4a8b48410bb9bada5266341828.pdf
    • https://static.usrfiles.com/ugd/d63aaf_4eb1d118877f45558d6ee1c92dc2d363.pdf
    • https://static.usrfiles.com/ugd/9e53d4_d8d328552c6b415186a2c36928090670.pdf
    • https://static.usrfiles.com/ugd/20d83a_82193677638f4f23b51d1bf782f6c8fc.pdf
    • https://static.usrfiles.com/ugd/374ce0_2347864fb50a4c548390299dc0a12b81.pdf
    • https://cdn.shopify.com/s/files/1/0457/3623/1068/files/best_android_games_offline_obb.pdf
    • https://cdn.shopify.com/s/files/1/0431/2888/1313/files/zawezewuluwog.pdf
    • https://cdn.shopify.com/s/files/1/0429/0812/3303/files/kambi_katha_malayalam_free.pdf
    • https://cdn.shopify.com/s/files/1/0457/8489/1558/files/29441684738.pdf
    • https://static.usrfiles.com/ugd/5e81b9_acc5639ed0464c1bab2dd279b66b17fe.pdf
    • https://static.usrfiles.com/ugd/c75f60_988d49501d034b2dacdde315e206eadc.pdf
    • https://static.usrfiles.com/ugd/c068f8_275d5cbe7d094c558ccbce1cc3cc3e25.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_off00007ee2.bin
9ab3c5a8feb96961cf57e44110ab1e0fbf7043373f1f8b903a109e55ce18bddc
pdf-font-stream PDF embedded font (sfnt) at offset 0x7EE2 5488 bytes
font_01_sfnt_off0000917a.bin
3587a79e15adb3067fabd938b7351465b3fc4d0370fa0ddf2447310a11ad3ddb
pdf-font-stream PDF embedded font (sfnt) at offset 0x917A 10672 bytes