Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2bc9ea3f04a0769…

MALICIOUS

PDF

49.6 KB Created: 2020-08-30 18:27:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3735f0735557307f91bcaa60319fae9d SHA-1: b19ab1ee3b6d2bbdeddc4cabf74d453fd404d91c SHA-256: b2bc9ea3f04a0769cc85fa9c33349452a2823aeb5dba11962360e2f84e061842
152 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by an ML classifier and contains a significant number of external links, indicating a potential link farm or redirection strategy. One of the embedded URLs, https://ttraff.com/wix?keyword=beni+b%25C3%25B6yle+sev+m%25C3%25BCzi%25C4%259Fi, is identified as a known malicious redirector. The document body contains garbled text but also includes the same suspicious URL and a benign-looking PDF link, suggesting an attempt to disguise malicious activity.

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/wix?keyword=beni+b%25C3%25B6yle+sev+m%25C3%25BCzi%25C4%259Fi
    • https://static.usrfiles.com/ugd/b8c837_703ffef223da4f76a51eb4bc49d24e1d.pdf
    • https://static.usrfiles.com/ugd/b8c837_b5ce2959be1140ceb0e46b680de0cc8e.pdf
    • https://static.usrfiles.com/ugd/f46427_4942388e21d54e02b2e114b899e80ba7.pdf
    • https://static.usrfiles.com/ugd/12f4eb_49cc67ec881d46858ff201e00ddce84e.pdf
    • https://static.usrfiles.com/ugd/63022f_515c9e5b61ae47d380dcd078892fc1fd.pdf
    • https://static.usrfiles.com/ugd/5bb01c_9bd443deaa354afbb7e116e4fe2811b7.pdf
    • https://static.usrfiles.com/ugd/837d34_e5599d86efd94018ba31bab29ef0270d.pdf
    • https://static.usrfiles.com/ugd/9c0842_42c3b5b03aac43b69f543841b65f2fa2.pdf
    • https://static.usrfiles.com/ugd/b8c837_bbd5105def9649e1a620f65a4156f451.pdf
    • https://static.usrfiles.com/ugd/b8c837_5ef510d21cea40feb2e98415b686354f.pdf
    • https://static.usrfiles.com/ugd/02beb7_9c46ec50a08745da84e471c8f4d8d766.pdf
    • https://cdn.shopify.com/s/files/1/0430/8592/2466/files/pururekinuvotopozi.pdf
    • https://cdn.shopify.com/s/files/1/0430/0816/3993/files/42267549098.pdf
    • https://cdn.shopify.com/s/files/1/0427/8488/2844/files/zokefegatefaduker.pdf
    • https://cdn.shopify.com/s/files/1/0432/7263/4533/files/panejibekitaj.pdf
    • https://cdn.shopify.com/s/files/1/0431/8140/8420/files/petenivovinadivi.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_off0000817c.bin
9acd982df0704c772d3fe310c09a70a0b5ca890065ea07580a540c0479f4f1be
pdf-font-stream PDF embedded font (sfnt) at offset 0x817C 5416 bytes
font_01_sfnt_off00009379.bin
2b13cc30d2041b7effad7ea3a17c7dc6f5473c3c2266c29c155f77f0be4e1c0b
pdf-font-stream PDF embedded font (sfnt) at offset 0x9379 11732 bytes