Malicious PDF — malware analysis report

Static analysis result for SHA-256 07add44d7dda2a27…

MALICIOUS

PDF

35.9 KB Created: 2020-09-07 17:26:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 086a8b34a6d08c6aa98ad0f365bc986f SHA-1: 413eb05258352f108cc79f99a55aa879d6a41dcf SHA-256: 07add44d7dda2a2722f8bd3a56937b4fbf4b77a8ddad10236a4f08d13859fb9b
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains the same malicious URL. This suggests the primary purpose is to redirect users to malicious infrastructure, potentially for further exploitation or phishing. The ML classifier also strongly indicated maliciousness.

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.club/wix?keyword=azadi+video+song++pagalworld
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/d162e3_b58a1e7690a2461490786e05f6a65810.pdf
    • https://static.usrfiles.com/ugd/a9e086_9ccd4327d18f415aab17e15cdd943b23.pdf
    • https://static.usrfiles.com/ugd/f523c3_105528cfda3c493e93d3fed77da0fd62.pdf
    • https://static.usrfiles.com/ugd/cb2bed_37170671285f4f03bd607279209a7f86.pdf
    • https://static.usrfiles.com/ugd/b8c837_ce55f607c6754316ae7eb4bbd0c77753.pdf
    • https://static.usrfiles.com/ugd/8c0e65_514b5a959a8045a7a821d5b226f79af8.pdf
    • https://cdn.shopify.com/s/files/1/0435/4070/9527/files/40147661785.pdf
    • https://cdn.shopify.com/s/files/1/0429/7352/8213/files/48196539871.pdf
    • https://cdn.shopify.com/s/files/1/0436/9825/8088/files/akron_rubber_ducks_schedule.pdf
    • https://static.usrfiles.com/ugd/9ff9b8_0ca32548b383483dbb8218c960e48af7.pdf
    • https://static.usrfiles.com/ugd/b8c837_75478dc538074fe6bf2e28b0bf819761.pdf
    • https://static.usrfiles.com/ugd/c0b427_0b5ad88e6e3a4483b9783dea7d387f02.pdf
    • https://static.usrfiles.com/ugd/b8c837_a36c8583f62e4a5581e4a3c14d6868a1.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_off00004e20.bin
12a039d0b99ff45362fb9ced55703daef019bff5e5ba901de3113e8633a2e369
pdf-font-stream PDF embedded font (sfnt) at offset 0x4E20 5320 bytes
font_01_sfnt_off00006060.bin
39bc0a0579be656495673ae4d1f3457030c9609515bfb61695617da3dcab16f2
pdf-font-stream PDF embedded font (sfnt) at offset 0x6060 10060 bytes