Malicious PDF — malware analysis report

Static analysis result for SHA-256 b809801ebd8b85d5…

MALICIOUS

PDF

46.7 KB Created: 2020-08-06 16:10:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1905aa91b65dc774dbd187e428976ae5 SHA-1: 6b8b80d06231450a6fe36be5a112153e1a857d8b SHA-256: b809801ebd8b85d5d31ec0b8c02e361ace7db507f3757305986b17ab4e5c8aa2
152 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded URLs, with a heuristic identifying it as a link farm. One of the primary URLs, 'https://ttraff.cc/pify?keyword=artichokes+heart+pdf', is flagged as a malicious redirector. This suggests the document's purpose is to lure users to malicious sites through a chain of redirects, likely for phishing or malware distribution.

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=artichokes+heart+pdf
    • http://jarul.genuineplusco.com/uploads/1/3/1/4/131453133/0c363adc201.pdf
    • http://files.wwwwilsonsconsultancy.com/uploads/1/3/2/7/132712451/2014226.pdf
    • http://files.kangenwater247.com/uploads/1/3/0/7/130776509/216f26.pdf
    • https://cdn.shopify.com/s/files/1/0429/6740/0601/files/96755738916.pdf
    • https://cdn.shopify.com/s/files/1/0433/4705/0661/files/23614119606.pdf
    • https://cdn.shopify.com/s/files/1/0433/7369/1045/files/zoho_imap_settings.pdf
    • https://cdn.shopify.com/s/files/1/0439/2042/5115/files/69874268623.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/20597849085.pdf
    • https://cdn.shopify.com/s/files/1/0431/9959/4656/files/99323746978.pdf
    • https://cdn.shopify.com/s/files/1/0430/4253/7629/files/vepulogoneru.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/38935964995.pdf
    • https://cdn.shopify.com/s/files/1/0434/7107/7542/files/robebusisuwodofu.pdf
    • https://cdn.shopify.com/s/files/1/0434/4047/2229/files/61530529518.pdf
    • https://cdn.shopify.com/s/files/1/0433/8434/0630/files/zenuvonotibelebulasok.pdf
    • https://cdn.shopify.com/s/files/1/0438/3657/1808/files/xiginewamobelowalafob.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006c22.bin
f30ef1b5a8e65560bcdb0279482aed7e72ef4b574689b4c09aa3ca4a8e862ec5
pdf-font-stream PDF embedded font (sfnt) at offset 0x6C22 4948 bytes
font_01_sfnt_off00007d06.bin
4f7cac0b263980bc4bdf0c43912186182b1a6fbb5469fb5f25307f1ca3969e3b
pdf-font-stream PDF embedded font (sfnt) at offset 0x7D06 10428 bytes
font_02_sfnt_off0000a02b.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333
pdf-font-stream PDF embedded font (sfnt) at offset 0xA02B 4324 bytes