Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba2fd4ced7f8ee9e…

MALICIOUS

PDF

37.2 KB Created: 2020-08-31 18:20:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1ee5356ef2bc23c2b52dcea7306566ad SHA-1: fe996d7cb774ca79144fe0499bcc05fc89dc7119 SHA-256: ba2fd4ced7f8ee9e92cdddf60f354b8bca28acddab43f47991ff30af1550ad1b
152 Risk Score

Malware Insights

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

The PDF document was flagged by a machine learning classifier and contains a significant number of embedded links. One of these links, 'https://ttraff.cc/wix?keyword=sahara+reporters+today%2527+s+news+headlines', is associated with known malicious redirector infrastructure. The document body, though partially corrupted, also contains this URL, suggesting it is the primary lure. The presence of numerous other links to PDF files hosted on static.usrfiles.com and cdn.shopify.com indicates a link farm designed to obscure the malicious destination.

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/wix?keyword=sahara+reporters+today%2527+s+news+headlines
    • https://static.usrfiles.com/ugd/e643da_99dd89b59d9c471aada79024e58d2742.pdf
    • https://static.usrfiles.com/ugd/191a6d_eb1bf8271bac40dfa3c8f1effa9c0e56.pdf
    • https://static.usrfiles.com/ugd/d902bb_8ee254d713cd4149b8272ceb66349045.pdf
    • https://cdn.shopify.com/s/files/1/0435/7583/6840/files/vebatojur.pdf
    • https://cdn.shopify.com/s/files/1/0440/0722/7542/files/texas_instruments_30xiib.pdf
    • https://static.usrfiles.com/ugd/b8c837_aeff4ba2c74d4a128f8b9975cb84a643.pdf
    • https://static.usrfiles.com/ugd/a18aa6_a24970c20a914ee5a5dd4d013b8afd92.pdf
    • https://static.usrfiles.com/ugd/37321e_7423c3aa5d3d401dbd43339659b4c79e.pdf
    • https://static.usrfiles.com/ugd/b8c837_f13d592d63f04b73bc46ec6e87058987.pdf
    • https://cdn.shopify.com/s/files/1/0438/5023/6064/files/3415602766.pdf
    • https://cdn.shopify.com/s/files/1/0429/2067/3433/files/biology_spm_short_notes.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_off00005528.bin
d0dac6185f023a158634ba4931d43f428bb3886a4cbc5fa70d708471c569ae4f
pdf-font-stream PDF embedded font (sfnt) at offset 0x5528 5380 bytes
font_01_sfnt_off00006783.bin
d5a91437f681d23196f3ac27eabfa0da89b8fd0043ec4221918f4656e257f34d
pdf-font-stream PDF embedded font (sfnt) at offset 0x6783 9516 bytes