Malicious PDF — malware analysis report

Static analysis result for SHA-256 341bbc0fedd0998c…

MALICIOUS

PDF

53.8 KB Created: 2020-09-01 03:10:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7fb699b2abf6d78d841b6239eff81881 SHA-1: d66a8ed67b65c35869f393f0d4235eaf683f15aa SHA-256: 341bbc0fedd0998c209f656f946a4b260420155a3c1d731392fd1f0bb61263b9
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with a critical heuristic identifying it as a malicious redirector link farm. The primary malicious URL, https://ttraff.com/wix?keyword=grid+template+rows+min+max, is flagged as a redirector. The document body, though heavily obfuscated, contains this URL, suggesting an attempt to direct users to potentially harmful content or further malicious downloads.

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=grid+template+rows+min+max
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_bf9c468857594894962c9dc63e4cee9e.pdf
    • https://static.usrfiles.com/ugd/33a2e4_02858d27b8a34b5981e647157b9b2d71.pdf
    • https://static.usrfiles.com/ugd/0c41e7_7b8b36bdc2e740fe9612dc2ee38d5e9b.pdf
    • https://static.usrfiles.com/ugd/6908d7_486d701a059f4719b9435a4b5f7d26d1.pdf
    • https://cdn.shopify.com/s/files/1/0436/9452/2523/files/monster_manual_2_3._5.pdf
    • https://cdn.shopify.com/s/files/1/0438/0665/4626/files/dcom_configuration_guide.pdf
    • https://static.usrfiles.com/ugd/b8c837_23a055ba82364faa9aee6e7df11a00e8.pdf
    • https://static.usrfiles.com/ugd/270e53_2dff99b1afb047fcb56d8dcdf07a8850.pdf
    • https://static.usrfiles.com/ugd/b8c837_e8842bec2de24456a8403725306eee8f.pdf
    • https://cdn.shopify.com/s/files/1/0434/6091/9446/files/vepikagufa.pdf
    • https://cdn.shopify.com/s/files/1/0461/7489/6281/files/xinamowavumijowapukede.pdf
    • https://cdn.shopify.com/s/files/1/0432/5661/0969/files/livro_os_argonautas_do_pacC3ADfico_ocidental.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_off00007e44.bin
393c87ba325674403eae43001886c1e34447d5148f8daeaab44cc28d18854132
pdf-font-stream PDF embedded font (sfnt) at offset 0x7E44 5296 bytes
font_01_sfnt_off0000903f.bin
13678a14b930e6d42e11b2ac41b13981c2c7f5938cc30cfb194ad51886f1f1dd
pdf-font-stream PDF embedded font (sfnt) at offset 0x903F 2092 bytes
font_02_sfnt_off000099e4.bin
da593b32b8619bc3cc86e9ee0b587d5fa1fcdef9d58e81f2cc83b3c43a43b64e
pdf-font-stream PDF embedded font (sfnt) at offset 0x99E4 15512 bytes