Malicious PDF — malware analysis report

Static analysis result for SHA-256 19aca341aeb72585…

MALICIOUS

PDF

177.6 KB Created: 2020-08-29 02:52:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bc028cfcbeebe0ba044493c6833f1f77 SHA-1: 022de079cd852fecee99b1be9dd7ca732c7b351e SHA-256: 19aca341aeb72585b5287a398066f44cff15c4a566a5bb5863c008bf7f71b1d0
94 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector URL, ttraff.com, which is flagged by heuristics. The ML classifier also strongly indicates maliciousness. The embedded content, though obfuscated, appears to be part of a lure, and the primary malicious action is the redirection to the external URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 3

  • 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.
  • 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/wix?keyword=obito+descubre+la+verdad+sobre+rin
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_6690fb169f5d4519ae7e6e9a55f3cb58.pdf
    • https://static.usrfiles.com/ugd/b8c837_fd7a7dff12284ecf9853e3bbb2a7b9bd.pdf
    • https://static.usrfiles.com/ugd/b8c837_e9949b50c03744fc9e4eac8629827ea3.pdf
    • https://static.usrfiles.com/ugd/b8c837_fca9b70c27e743ee82280ac60cf0ac31.pdf
    • https://static.usrfiles.com/ugd/b8c837_41b445d729604eb491da607c374981f2.pdf
    • https://cdn.shopify.com/s/files/1/0432/1860/0095/files/deborah_harkness_all_souls_trilogy_free.pdf
    • https://cdn.shopify.com/s/files/1/0433/6369/6805/files/chop_stix_milwaukee_wi.pdf
    • https://cdn.shopify.com/s/files/1/0434/9945/4628/files/fedabezefobonelovokolubap.pdf
    • https://cdn.shopify.com/s/files/1/0430/6147/7527/files/14595017561.pdf
    • https://static.usrfiles.com/ugd/b8c837_4646e54ddc0649e38460ee08418bcde8.pdf
    • https://static.usrfiles.com/ugd/b8c837_54e8b102048c4dca9b8bdb9a244ef5ac.pdf
    • https://cdn.shopify.com/s/files/1/0431/8904/3358/files/kujefitetelokikexakofowol.pdf
    • https://cdn.shopify.com/s/files/1/0435/2930/6263/files/29288328117.pdf
    • https://cdn.shopify.com/s/files/1/0437/9086/0437/files/cholesterol_biochemistry.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_off0001dafa.bin
010b57429cccada9d922b21c81d2d58b530b9024f4b57715faed0b3290e5b24d
pdf-font-stream PDF embedded font (sfnt) at offset 0x1DAFA 54752 bytes
font_01_sfnt_off00028064.bin
473a7b6c94040b87c233a55608d1f97e11d76eb0f10dd31ef47d257f16b25813
pdf-font-stream PDF embedded font (sfnt) at offset 0x28064 5160 bytes
font_02_sfnt_off000291f9.bin
03d60502a31cb16e4a60a93b81a54fb17384f0c2e666b32cc1f3c3f52ced12d6
pdf-font-stream PDF embedded font (sfnt) at offset 0x291F9 11172 bytes