Malicious PDF — malware analysis report

Static analysis result for SHA-256 15a506c114c02aad…

MALICIOUS

PDF

33.7 KB Created: 2020-08-23 02:27:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 47238e9fa6e15c0c134cd0fd6792ad23 SHA-1: c2ad410d51dbf64948123c5a3da180a3adca1af9 SHA-256: 15a506c114c02aadcd2e5340251bae60451e9d61bac86c1f339870ffa1b7d9b6
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many of which point to a link farm designed to redirect users to malicious infrastructure. The primary malicious URL identified is https://ttraff.com/pify?keyword=anari+film+ki+ringtone, which is flagged as a malicious redirector. The document body, though heavily obfuscated, contains references to this URL and other PDF links, suggesting a social engineering attempt to drive traffic to malicious sites.

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=anari+film+ki+ringtone
    • http://sosaw.futurereadyacademy.org/uploads/1/3/1/1/131163635/zesanufut.pdf
    • http://lawojuz.donnahebertdesign.com/uploads/1/3/1/4/131407435/2150079.pdf
    • http://files.greenleafpsychological.com/uploads/1/3/2/7/132740619/f9b3c.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0438/8922/9979/files/fujujaruwezebun.pdf
    • https://cdn.shopify.com/s/files/1/0432/6844/0232/files/fezujulefaberixu.pdf
    • https://cdn.shopify.com/s/files/1/0431/0263/4148/files/98351371826.pdf
    • https://cdn.shopify.com/s/files/1/0433/9607/1578/files/63080575649.pdf
    • https://cdn.shopify.com/s/files/1/0431/1236/6229/files/40780739874.pdf
    • https://cdn.shopify.com/s/files/1/0434/2556/2785/files/afrojack_songs_turn_up_the_speakers.pdf
    • https://cdn.shopify.com/s/files/1/0433/4603/4843/files/500_greatest_songs_of_all_time.pdf
    • https://cdn.shopify.com/s/files/1/0428/0100/4707/files/kevok.pdf
    • https://cdn.shopify.com/s/files/1/0434/0711/4391/files/50960178995.pdf
    • https://cdn.shopify.com/s/files/1/0429/9161/6153/files/marijamezixozipomirojobu.pdf
    • https://cdn.shopify.com/s/files/1/0436/0696/6430/files/89760645395.pdf
    • https://cdn.shopify.com/s/files/1/0438/3372/0992/files/domakoganumur.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_off00004876.bin
3cb68dcedbdf6a752acef3b965fd32ce4427fd0d67c303ed2ca48e6c4573ee9d
pdf-font-stream PDF embedded font (sfnt) at offset 0x4876 4960 bytes
font_01_sfnt_off0000593e.bin
efad6d097f717c381496d6673670aea18b2d2f44330723a32694e97465d5d11e
pdf-font-stream PDF embedded font (sfnt) at offset 0x593E 9628 bytes