Malicious PDF — malware analysis report

Static analysis result for SHA-256 b060f577aa090c56…

MALICIOUS

PDF

51.8 KB Created: 2020-08-23 00:55:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e2bdc5e44b01a2935d421697e92631c2 SHA-1: 20d1cac391d54cf5c82a47c28d7794a3045ae4da SHA-256: b060f577aa090c56b2ed8d6a6e47e8be339b35f0fe2d125eef543b254ddc9404
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. The ML classifier strongly indicates maliciousness. The document body, though heavily obfuscated, contains the malicious URL, suggesting the primary intent is to redirect users to potentially harmful content.

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/pify?keyword=top+anime+opening+songs
    • http://files.theskinandlashlady.com/uploads/1/3/0/9/130969469/wagumapegezis.pdf
    • http://besag.asiacontentmarketing.net/uploads/1/3/1/4/131437064/zasetifosefiliw-sujizogifabisa-lefuxot.pdf
    • http://files.baracambridge.org/uploads/1/3/0/7/130775521/ritolex.pdf
    • http://tufufobaj.visionquest50.com/uploads/1/3/1/4/131452903/beruzimiwefuju.pdf
    • https://cdn.shopify.com/s/files/1/0431/2937/2832/files/tumebugenadubobuxelo.pdf
    • https://cdn.shopify.com/s/files/1/0433/2801/2456/files/72899286523.pdf
    • https://cdn.shopify.com/s/files/1/0437/2663/5162/files/bonhomme_allumette.pdf
    • https://cdn.shopify.com/s/files/1/0445/9751/0308/files/33075561144.pdf
    • https://cdn.shopify.com/s/files/1/0436/8452/8281/files/english_speaking_course_book_free_download_file.pdf
    • https://cdn.shopify.com/s/files/1/0431/3061/8011/files/xajifa.pdf
    • https://cdn.shopify.com/s/files/1/0428/2214/0063/files/blink_182_tab_book.pdf
    • https://cdn.shopify.com/s/files/1/0430/6518/0314/files/68295197261.pdf
    • https://cdn.shopify.com/s/files/1/0429/8702/8641/files/watch_cartoon_online_app_android.pdf
    • https://cdn.shopify.com/s/files/1/0432/5598/8374/files/19212627231.pdf
    • https://cdn.shopify.com/s/files/1/0430/6799/8362/files/agree_disagree_questionnaire_template.pdf
    • https://cdn.shopify.com/s/files/1/0427/6027/4087/files/64991408126.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008455.bin
3fe25695508df406295a37941587534f5c00e29a3ba39a8edb26d36b613d85ec
pdf-font-stream PDF embedded font (sfnt) at offset 0x8455 4960 bytes
font_01_sfnt_off00009524.bin
0a23e67bed5c063390f60f4e75da32a0e817d0c110b4b56f079eb53e65345693
pdf-font-stream PDF embedded font (sfnt) at offset 0x9524 14384 bytes