Malicious PDF — malware analysis report

Static analysis result for SHA-256 359564c6c400ace9…

MALICIOUS

PDF

43.2 KB Created: 2020-09-07 00:13:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d52d53245b119d06ec7f1aa50e9b42b7 SHA-1: 36eba53585d5fc9fb61f4257fdda32ab13e1ef41 SHA-256: 359564c6c400ace9dc403eb5d4198907e1d104e7bfaa444925c69eaa903915df
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains numerous links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains a URL that appears to be a lure for prescribing information. The presence of a malicious redirector suggests an attempt to lead the user to a malicious site, likely for further exploitation or credential harvesting. No scripts were extracted from this sample.

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.me/wix?keyword=bydureon+prescribing+information
    • https://static.usrfiles.com/ugd/b8c837_912440e77ed84e83bf6efcd6eb7d9f54.pdf
    • https://static.usrfiles.com/ugd/9d24cb_d0d9e83b9dc04ad0ab061900571a6ce4.pdf
    • https://static.usrfiles.com/ugd/78daac_cb88cad4c30d41a38393a72e8305bfeb.pdf
    • https://static.usrfiles.com/ugd/6240f8_dc102a8474364737a2057bbb70d3bef9.pdf
    • https://static.usrfiles.com/ugd/afbef4_a86c635a7317410ebfb2b2069ff3f247.pdf
    • https://static.usrfiles.com/ugd/895bef_f098dc7afdc94efb92ad20b51f0eb02e.pdf
    • https://static.usrfiles.com/ugd/b91566_a9d3ec082f354e959daaeb0866b91eb8.pdf
    • https://static.usrfiles.com/ugd/e42ee3_181a911c035248e4bdd2387397e2b860.pdf
    • https://static.usrfiles.com/ugd/b8c837_32f6563762d24f5e9b8764a9afd3a3ee.pdf
    • https://static.usrfiles.com/ugd/ce14f3_95b582a88d044161a8e0bd42fe37fc35.pdf
    • https://static.usrfiles.com/ugd/2c76f4_24f117c6aab8455b86a2d841db1bb606.pdf
    • https://static.usrfiles.com/ugd/359e64_0944bb52573942fba156598378ef0570.pdf
    • https://static.usrfiles.com/ugd/96a426_244e3052d98e4382b7c41e07e7d7cd87.pdf
    • https://cdn.shopify.com/s/files/1/0430/4489/6925/files/gorazolavodafusaruwoges.pdf
    • https://cdn.shopify.com/s/files/1/0432/9039/4788/files/business_agreement_between_two_companies_template.pdf
    • https://cdn.shopify.com/s/files/1/0434/6406/5174/files/91901679720.pdf
    • https://cdn.shopify.com/s/files/1/0431/7046/3912/files/sat_answer_sheet_printable.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_off000069f4.bin
48aa95f661be816d42518c6f61dd554f5971ab9464ab0a590fe2aa667dfe5645		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69F4 5732 bytes
font_01_sfnt_off00007d73.bin
9aeb113722e1f0b60a143d3b61d75753e3194c238506fce956486be926f9e12b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D73 10068 bytes

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