Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f246132a4e9bede…

MALICIOUS

PDF

44.2 KB Created: 2020-08-30 17:56:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d6727b6b13605258dad31d9d1cc4f0d7 SHA-1: 9030f342bf77014526a0fb2e9780da0cc1f344f3 SHA-256: 5f246132a4e9bedefefee6b8105b352ecb2994628006bb8199404a1b9fd4be53
154 Risk Score

Malware Insights

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

This PDF document contains a link that redirects to a known malicious infrastructure, identified by the heuristic PDF_MALICIOUS_REDIRECTOR_LINK. The document body and embedded links suggest a lure related to a webquest, likely intended to trick users into clicking the malicious URL. The presence of numerous other PDF links, flagged by PDF_SEO_LINK_FARM, further indicates a link farm or spamming operation.

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/wix?keyword=dna+from+the+beginning+webquest+answ
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/191a6d_d18d46d577fd4deb84e0204d99caa4c3.pdf
    • https://static.usrfiles.com/ugd/b8c837_e0120433f8ed46b1b7e740f4ad7a52f0.pdf
    • https://static.usrfiles.com/ugd/90c678_d705952907a345199e29875c47a05e2a.pdf
    • https://static.usrfiles.com/ugd/b8c837_060138f2871a49a7bc2d626374364a97.pdf
    • https://static.usrfiles.com/ugd/15cd4d_ff785025ba0549d9b80a2ceb342deedb.pdf
    • https://static.usrfiles.com/ugd/79e0dc_fb3335c53d0548328c1ff889f4f37f96.pdf
    • https://static.usrfiles.com/ugd/b8c837_a6174b4b10694f6aaf6d5218462505bf.pdf
    • https://static.usrfiles.com/ugd/90423f_1bc35753d1a44014a128a40dd4335ae1.pdf
    • https://cdn.shopify.com/s/files/1/0428/0349/5071/files/ganewopenitomimagobewe.pdf
    • https://cdn.shopify.com/s/files/1/0432/6948/8798/files/68293985037.pdf
    • https://static.usrfiles.com/ugd/3b47cb_d42a548fdd8c4f15bb9ea3f1bb6e79d2.pdf
    • https://static.usrfiles.com/ugd/76de1a_05361526b6044676bda53ac0b9d04ef9.pdf
    • https://static.usrfiles.com/ugd/b8c837_66ffbac10baa43a1afe90f3009dc55b7.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_off00006ea3.bin
1d439ce9a6272afb1e08e9636dafb17698b72b225cd6f45b07801a9a716923a5
pdf-font-stream PDF embedded font (sfnt) at offset 0x6EA3 5508 bytes
font_01_sfnt_off00008146.bin
e34542429f46ae700037e70debe3ed71a56098145b305c7acb1820870f38ba57
pdf-font-stream PDF embedded font (sfnt) at offset 0x8146 10180 bytes