Malicious PDF — malware analysis report

Static analysis result for SHA-256 7110f987670d7f3f…

MALICIOUS

PDF

45.7 KB Created: 2020-08-18 16:01:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bf7b3eb7f5d94efcacb7627ea548682b SHA-1: f841107c270ea52f9224704c92fe8a6156c1bad1 SHA-256: 7110f987670d7f3f890d53e525877caedb106c87c869cd0d4d3e36c7a4bc59f9
154 Risk Score

Malware Insights

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

The PDF contains embedded links that point to a known malicious redirector, ttraff.com, which is designed to lead users to malicious content. The document body, though heavily obfuscated, contains text suggesting it is a 'consumer reports cars pdf', a common lure for phishing or malware delivery. The presence of numerous links, many pointing to Shopify domains hosting PDFs, suggests a link farm or SEO poisoning tactic to increase visibility and click-through rates to the malicious redirector.

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/pify?keyword=consumer+reports+cars+pdf
    • http://files.singaporeaerosupportservices.com/uploads/1/3/2/6/132682790/nipezifobavimaru.pdf
    • http://files.hgoldsteincpa.com/uploads/1/3/1/3/131398109/lazejewutepixi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0431/2875/0241/files/8529439237.pdf
    • https://cdn.shopify.com/s/files/1/0433/8073/6151/files/4294348260.pdf
    • https://cdn.shopify.com/s/files/1/0433/0727/0312/files/game_activity_discord.pdf
    • https://cdn.shopify.com/s/files/1/0431/0689/3985/files/apache_tomcat_for_windows_8.pdf
    • https://cdn.shopify.com/s/files/1/0432/2859/4336/files/how_to_report_spearman_correlation_results_spss.pdf
    • https://cdn.shopify.com/s/files/1/0434/6875/0998/files/xofidaniforub.pdf
    • https://cdn.shopify.com/s/files/1/0434/0688/5027/files/48402913723.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/55079075607.pdf
    • https://cdn.shopify.com/s/files/1/0433/3764/6245/files/59899110679.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/15138334831.pdf
    • https://cdn.shopify.com/s/files/1/0434/7081/5397/files/54557613712.pdf
    • https://cdn.shopify.com/s/files/1/0428/9547/4855/files/repimiguvuz.pdf
    • https://cdn.shopify.com/s/files/1/0431/6489/3345/files/pajosuxekonugu.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_off000066ee.bin
bf1e2f94e61468718b08fc5eda2778570060173dbb474de46722240a96deeda6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66EE 5128 bytes
font_01_sfnt_off00007839.bin
149d5ee5db868b29810fc0ac71e051902df1d5f8740ac161836f53c27b51f8e8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7839 10436 bytes
font_02_sfnt_off00009bee.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9BEE 4324 bytes

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