Malicious PDF — malware analysis report

Static analysis result for SHA-256 882a73a86e988e5c…

MALICIOUS

PDF

36.3 KB Created: 2020-08-26 04:24:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4092591618a32e407298c2a13314939b SHA-1: 00b71578c8c39479db9eb311facef5439e2ef057 SHA-256: 882a73a86e988e5c6e00d955bab10b3f81cac445c94a5b8eb0cd91904125c4e1
154 Risk Score

Malware Insights

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

This PDF document contains numerous embedded links, with one identified as a malicious redirector. The primary malicious link, https://ttraff.cc/pify?keyword=kelebe%25C4%259Fin+r%25C3%25BCyas%25C4%25B1+filmi+izle+tek+par%25C3%25A7a, suggests a phishing or malware distribution attempt disguised as a movie streaming service. The document body, though heavily obfuscated, contains references to movie titles and the wkhtmltopdf application, reinforcing the lure.

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=kelebe%25C4%259Fin+r%25C3%25BCyas%25C4%25B1+filmi+izle+tek+par%25C3%25A7a
    • http://files.healthyrelationships101.com/uploads/1/3/1/6/131607237/1185952.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/12319118289.pdf
    • https://cdn.shopify.com/s/files/1/0432/2174/5822/files/ms_sql_dba_interview_questions_and_answers.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nalajenoderemomepofelefa.pdf
    • https://cdn.shopify.com/s/files/1/0438/4423/9510/files/voice_and_the_alexander_technique.pdf
    • https://cdn.shopify.com/s/files/1/0428/5035/3318/files/45283890018.pdf
    • https://cdn.shopify.com/s/files/1/0433/5743/8101/files/godefafirozavetafut.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/32823332632.pdf
    • https://cdn.shopify.com/s/files/1/0433/8922/3066/files/sidifil.pdf
    • https://cdn.shopify.com/s/files/1/0435/8933/7256/files/alter_ego_b1_cahier_d_activits_corrige.pdf
    • https://cdn.shopify.com/s/files/1/0433/1657/6424/files/72431449529.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_off000049ea.bin
43bf16bb0856f88b725f9b8a3c906387f00f2e42e8046ad9d464db7ed8f31952
pdf-font-stream PDF embedded font (sfnt) at offset 0x49EA 5936 bytes
font_01_sfnt_off00005dec.bin
c6baf9c9ba38671848d76ff127b62d082d46b964be4a5d8e0466a33788bb00d4
pdf-font-stream PDF embedded font (sfnt) at offset 0x5DEC 11784 bytes