Malicious PDF — malware analysis report

Static analysis result for SHA-256 1798c66e825dcce1…

MALICIOUS

PDF

37.7 KB Created: 2020-08-20 05:27:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d49425b181cb3d8d90e162898dbf67bd SHA-1: 4582022ebf3c84ffae9008d03f71dfb598b72943 SHA-256: 1798c66e825dcce131a00b70db10ea8574e2dd3a6306c5d1938eb7a36d2d66c1
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, which is disguised as a 'Bahawalpur board rechecking form'. The ML classifier strongly indicates maliciousness. The document body and embedded URLs suggest a phishing or scam attempt to redirect users to malicious infrastructure.

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=bahawalpur+board+rechecking+form
    • http://sijutad.outoftimedesigns.com/uploads/1/3/1/6/131606289/rajatito_subimulelegulof_favigup_tobot.pdf
    • http://files.kartzinellab.com/uploads/1/3/0/9/130969225/sularab.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0433/2794/6904/files/17238909339.pdf
    • https://cdn.shopify.com/s/files/1/0439/8376/5662/files/stay_hungry_stay_foolish_steve_jobs_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/5117/9423/files/puvepiwofenomezovawem.pdf
    • https://cdn.shopify.com/s/files/1/0432/3773/6603/files/coran_en_franais.pdf
    • https://cdn.shopify.com/s/files/1/0450/2791/7974/files/juvofi.pdf
    • https://cdn.shopify.com/s/files/1/0434/7399/3890/files/50995811152.pdf
    • https://cdn.shopify.com/s/files/1/0430/8982/1845/files/ideological_conflict.pdf
    • https://cdn.shopify.com/s/files/1/0427/7128/4135/files/eclipse_shortcuts_java.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004824.bin
ddb9b862547913885ee38462bbc2a5fbcd5f93ba7a5d25318bc768a7dbc59045
pdf-font-stream PDF embedded font (sfnt) at offset 0x4824 5536 bytes
font_01_sfnt_off00005ace.bin
b20829aa73a47b94726df049f09e55b0b66d4a2b9f561e0a08d9587766582625
pdf-font-stream PDF embedded font (sfnt) at offset 0x5ACE 9884 bytes
font_02_sfnt_off00007c68.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e
pdf-font-stream PDF embedded font (sfnt) at offset 0x7C68 4324 bytes