Malicious PDF — malware analysis report

Static analysis result for SHA-256 1288b5b4a01a3c37…

MALICIOUS

PDF

42.5 KB Created: 2020-08-30 23:52:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6a629923d3e35b3c5c629557c4818a17 SHA-1: 6c0c9056e0b8b9b7fb07c0e99b51213af8b43af1 SHA-256: 1288b5b4a01a3c3740018d0aa2437f66e4704b914478b3088f19f73c873113a4
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 with a keyword related to budget tablets. This suggests a phishing or scam attempt. While no scripts were extracted, the PDF structure and embedded links are indicative of malicious intent, likely to redirect the user to a malicious site for further exploitation or information harvesting.

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=best+budget+tablet+2018+uk
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/5650/3704/files/past_simple_vs_past_continuous_exercises_intermediate.pdf
    • https://cdn.shopify.com/s/files/1/0436/0211/6772/files/rowevorulatozadixoxuru.pdf
    • https://cdn.shopify.com/s/files/1/0432/1977/9741/files/conflict_resolution_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0449/8341/9039/files/mujadepazoja.pdf
    • https://static.usrfiles.com/ugd/9c43ec_b865aea3b79e43bcacaeae0a48d9d06f.pdf
    • https://static.usrfiles.com/ugd/493135_fc1ca73143ae4dd1be301f44273e9f6e.pdf
    • https://static.usrfiles.com/ugd/dc8a8e_6560ea2242c847299218e3eede0dfdf7.pdf
    • https://static.usrfiles.com/ugd/b8c837_52db62049ba341ac819710c90a3ca29f.pdf
    • https://static.usrfiles.com/ugd/760101_cdb75f040ef04a6cbafb5e214d4e34c3.pdf
    • https://static.usrfiles.com/ugd/455f95_18f1fd38d60841b08b53d0e401b2a821.pdf
    • https://cdn.shopify.com/s/files/1/0437/5012/9813/files/adobe_pro_trial.pdf
    • https://cdn.shopify.com/s/files/1/0431/7410/1160/files/16565186613.pdf
    • https://cdn.shopify.com/s/files/1/0435/5896/1320/files/advanced_battery_calibration_root_apk.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_off00006599.bin
5f9447200957bf4cd6b24cf49ea644728cfb24584dda72987203fd4a5e01120d
pdf-font-stream PDF embedded font (sfnt) at offset 0x6599 5668 bytes
font_01_sfnt_off000078f3.bin
e203e9e5f88398f76a0e79d118c9e08f658fe02e01ed3670faa163058264254c
pdf-font-stream PDF embedded font (sfnt) at offset 0x78F3 10976 bytes