Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c7a231db027f812…

MALICIOUS

PDF

54.8 KB Created: 2020-08-22 08:24:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 733282686c8ecd2020b7762c000ff0bf SHA-1: 4f043c0b2b28f7288104a5d5f4347717bb5028fa SHA-256: 6c7a231db027f8122927b5b49703f3bc82921c7f2e0b1554d33e7a3a9a17ca24
154 Risk Score

Malware Insights

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

This PDF file exhibits malicious behavior through its extensive use of external links, including a known malicious redirector. The document body contains text and URLs that suggest an attempt to lure users or manipulate search engine results. The presence of numerous PDF links, many hosted on Shopify, points towards a link farm or redirection strategy, with one URL specifically flagged as malicious.

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=aahat+video++mp4
    • http://lejemajib.breakthroughtraininginstitute.com/uploads/1/3/1/4/131407655/638ae3.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://fedorahosted.org/lohit
    • https://cdn.shopify.com/s/files/1/0430/0803/2922/files/31078231209.pdf
    • https://cdn.shopify.com/s/files/1/0430/6200/1821/files/3361109096.pdf
    • https://cdn.shopify.com/s/files/1/0443/4529/5004/files/sociologia_del_trabajo.pdf
    • https://cdn.shopify.com/s/files/1/0434/3093/6733/files/66691753604.pdf
    • https://cdn.shopify.com/s/files/1/0430/9961/9492/files/36194334877.pdf
    • https://cdn.shopify.com/s/files/1/0434/1448/7190/files/10568302156.pdf
    • https://cdn.shopify.com/s/files/1/0435/9431/7981/files/datepipe_transform_example.pdf
    • https://cdn.shopify.com/s/files/1/0437/7218/2685/files/83328365583.pdf
    • https://cdn.shopify.com/s/files/1/0434/3260/7894/files/gumuwisafanomatit.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005490.bin
871c975e4cefa020ae8f4eb6424890faca872ce9b57b4f3cf179af7caf5de1d7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5490 4712 bytes
font_01_sfnt_off000064a9.bin
f2f135087ba82144bbd9a18afe5309ac63e0c0382114f81b11203e55551167b0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64A9 14680 bytes
font_02_sfnt_off000092ee.bin
e58e8e8d3617fa2f52d62469859eb662c26c1c1537dc21f5cc6f1aa71eaa6aed		 pdf-font-stream PDF embedded font (sfnt) at offset 0x92EE 18776 bytes
font_03_sfnt_off0000b055.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB055 4324 bytes
font_04_sfnt_off0000be56.bin
490cf39295379e45b0c67190c4e69b460c86182fe8e3dd247dd2302d00e094ba		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBE56 4176 bytes

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