Malicious PDF — malware analysis report

Static analysis result for SHA-256 8624954e5b50b59c…

MALICIOUS

PDF

32.0 KB Created: 2020-09-01 12:13:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0080f99345853ebe2abd3b7f76b824bd SHA-1: ee692f5a859c7c48585c208dd2e78f1a1bfa61be SHA-256: 8624954e5b50b59cdf0ffb8847116e5fa1a9841942ec55ff976f3c5344b9a2c3
154 Risk Score

Malware Insights

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

This PDF document contains a link farm designed to redirect users to malicious infrastructure, specifically identified by the URL https://ttraff.cc/wix?keyword=harrison+bergeron+reading+questions+answer+key. The document's content is obfuscated but appears to be a lure, presenting itself as an answer key to encourage clicks. The presence of numerous embedded links, many pointing to Shopify domains, suggests a tactic to disguise malicious activity within a seemingly legitimate document structure.

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.cc/wix?keyword=harrison+bergeron+reading+questions+answer+key
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/8785/4749/files/8104767081.pdf
    • https://cdn.shopify.com/s/files/1/0428/0667/3574/files/79055354292.pdf
    • https://cdn.shopify.com/s/files/1/0437/3587/5745/files/gutamapesuvo.pdf
    • https://static.usrfiles.com/ugd/544c7e_ff6c4222f7774112858c2669c4d878ff.pdf
    • https://static.usrfiles.com/ugd/ae15ca_13998b5c962f435d9165c33a9dc7e276.pdf
    • https://static.usrfiles.com/ugd/f3ecbe_55c51dbc079947f08ecd984d9dac9cfa.pdf
    • https://cdn.shopify.com/s/files/1/0440/8583/7989/files/normal_and_abnormal_behavior.pdf
    • https://cdn.shopify.com/s/files/1/0433/6913/6280/files/tezisoromuzosikitopa.pdf
    • https://cdn.shopify.com/s/files/1/0430/0754/1401/files/scroll_template_tes.pdf
    • https://cdn.shopify.com/s/files/1/0448/0204/8160/files/svb_bls_2020.pdf
    • https://cdn.shopify.com/s/files/1/0435/4477/2759/files/85490881773.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_off00003fc7.bin
0285ea25c08dcb1cb3b061a797f623827501d1a2ad857d57bd2fbb9758f011ec
pdf-font-stream PDF embedded font (sfnt) at offset 0x3FC7 5448 bytes
font_01_sfnt_off00005262.bin
483658b87a2cfb48e16e267a1b00c99ca6bca40b8f0841679d5eb13f40df5b42
pdf-font-stream PDF embedded font (sfnt) at offset 0x5262 9580 bytes