Malicious PDF — malware analysis report

Static analysis result for SHA-256 597d14da0cb497c1…

MALICIOUS

PDF

40.9 KB Created: 2020-08-30 10:10:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a0fd933759f9fa48ab9a884d14550361 SHA-1: ca85c935ef6a0336d6a52cbf388aab86db1269ce SHA-256: 597d14da0cb497c13adb10597b23c9c9ec4d75f4d748645a82117ef3dce75717
150 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as an Apple product review. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK and the embedded URL strongly indicate this is a phishing lure. The PDF also contains a link farm, suggesting it's part of a larger SEO poisoning campaign to distribute malicious content. No scripts were extracted, but the primary attack vector is the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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.ru/wix?keyword=apple+6+plus+review
    • https://static.usrfiles.com/ugd/77eba6_2e1430972a964b7b8d1f61b9d0d21ce7.pdf
    • https://static.usrfiles.com/ugd/b8c837_9bc31f4d6b524514a431ef7b2747371e.pdf
    • https://static.usrfiles.com/ugd/b8c837_0702c84649b94430bcc0d8d5193a9878.pdf
    • https://cdn.shopify.com/s/files/1/0429/7247/9647/files/74832727444.pdf
    • https://cdn.shopify.com/s/files/1/0431/9114/0512/files/xbox_one_windows_7_driver.pdf
    • https://static.usrfiles.com/ugd/1e4819_4ee2916fce354dc88dadec6da8a00bc6.pdf
    • https://static.usrfiles.com/ugd/accd1f_adb008fd376643d396c3042338d16481.pdf
    • https://static.usrfiles.com/ugd/451461_94c618f2a34e4cc0b97ea7c71bc570c6.pdf
    • https://static.usrfiles.com/ugd/b8c837_20006daf197246a7971e60afb59c9a42.pdf
    • https://static.usrfiles.com/ugd/b8c837_5befc4d52e1247e49ff40fd82dcd01e4.pdf
    • https://cdn.shopify.com/s/files/1/0431/6702/3253/files/industrial_instrumentation_lecture_notes.pdf
    • https://cdn.shopify.com/s/files/1/0432/8282/5382/files/59739222331.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/54686169254.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_off000062ef.bin
32e6ebc2f3e8ca3f8abf59828da269b6696ed206e4b07d8f03eddbcfb887d064		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62EF 4896 bytes
font_01_sfnt_off000073c0.bin
4de691cd85b182240b7986499604192d4f00a01b0801ad68baf94db165dd4512		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73C0 10304 bytes

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