Malicious PDF — malware analysis report

Static analysis result for SHA-256 01d70c5a2c8c5f74…

MALICIOUS

PDF

50.8 KB Created: 2020-08-20 18:04:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 986822649c5fd1693a63fdb63c662109 SHA-1: 726f0e5770768eb009a2b21a6cca8b8a7e4b0af1 SHA-256: 01d70c5a2c8c5f74d18157fa90ddf9d0e8409ac2f97b9b9fb5c12a83f56f4992
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector. The document body, though heavily obfuscated, contains a URL that points to a redirector, suggesting an attempt to lead the user to malicious content. The presence of a large number of external PDF links further indicates a link farm or redirection strategy.

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=bodybuilding+transformation+female+over+40
    • http://files.seaningham.org/uploads/1/3/0/7/130739962/7edf6c20.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/6520/5141/files/gidudagekidujokuwosovo.pdf
    • https://cdn.shopify.com/s/files/1/0430/6809/6661/files/67471889418.pdf
    • https://cdn.shopify.com/s/files/1/0437/6638/2749/files/opencv_3_c.pdf
    • https://cdn.shopify.com/s/files/1/0434/9558/8005/files/85528471673.pdf
    • https://cdn.shopify.com/s/files/1/0434/4345/4102/files/ap_biology_biochemistry_practice_test.pdf
    • https://cdn.shopify.com/s/files/1/0428/6224/8102/files/gemivonekofisi.pdf
    • https://cdn.shopify.com/s/files/1/0428/4101/4438/files/xagibotifogi.pdf
    • https://cdn.shopify.com/s/files/1/0433/4541/2245/files/40945748144.pdf
    • https://cdn.shopify.com/s/files/1/0436/7679/5030/files/71000571089.pdf
    • https://cdn.shopify.com/s/files/1/0433/6903/7982/files/77419218928.pdf
    • https://cdn.shopify.com/s/files/1/0428/8849/5270/files/61264907345.pdf
    • https://cdn.shopify.com/s/files/1/0433/3253/4440/files/cisco_ccna_200_125_book.pdf
    • https://cdn.shopify.com/s/files/1/0427/5650/5756/files/xadezumoxutenidodevelaves.pdf
    • https://cdn.shopify.com/s/files/1/0433/0808/9499/files/geworurozaragefi.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_off000087bd.bin
7608c5420deedcf1c855601bfa7db26c7c8c600cb17ba145de338d992ef7ea2a
pdf-font-stream PDF embedded font (sfnt) at offset 0x87BD 5808 bytes
font_01_sfnt_off00009b7b.bin
0ef92ff7978c4ec328159cb5f6f9159a9ebdab436e70a45a13acdd94da257acc
pdf-font-stream PDF embedded font (sfnt) at offset 0x9B7B 10060 bytes