Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4c3014c42146939…

MALICIOUS

PDF

45.2 KB Created: 2020-07-09 08:53:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e65899aa77ac8fc10c4c7bec3e36c302 SHA-1: 196aa0eeffecf8c8f37768575bb7814a4ae94a08 SHA-256: c4c3014c42146939a5a24bf994b253ac51028c74bbe30d58e59312709f05813e
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many of which point to external PDF files hosted on various domains, suggesting a link farm or redirection strategy. One prominent link, 'https://ttraff.com/wb?keyword=convert%20odt%20to%20pdf%20ipad', is identified as a malicious redirector. The document body, though partially corrupted, contains text related to file conversion, likely a lure to entice users to click the malicious links. The ML classifier strongly flagged this PDF as malicious.

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/wb?keyword=convert%20odt%20to%20pdf%20ipad
    • http://files.qcalogistics.com/uploads/1/3/0/7/130775561/foloju.pdf
    • http://files.hloyalpr.org/uploads/1/3/1/3/131379663/vibajoko_mijaragakofoxeb_netilukuredo.pdf
    • http://files.heavencanbefound.com/uploads/1/3/1/3/131384018/tizalunovemili.pdf
    • http://files.studiozenden.com/uploads/1/3/1/4/131453241/ponuduzubirulagasad.pdf
    • http://files.delbertsonrealty.com/uploads/1/3/0/7/130776370/pitiw_zujutumokofu.pdf
    • http://files.artlynchactingcoach.com/uploads/1/3/1/3/131380868/tagaxe.pdf
    • http://files.hartsvillemasons547.com/uploads/1/3/0/9/130969884/4005857.pdf
    • http://files.mciea.org/uploads/1/3/2/8/132814768/fadelus.pdf
    • https://mixumepenow322808010.files.wordpress.com/2020/06/lakesa.pdf
    • https://butisukumig.files.wordpress.com/2020/06/61992850574.pdf
    • https://noginamopak.files.wordpress.com/2020/06/41519536727.pdf
    • https://maturixox.files.wordpress.com/2020/06/55389287110.pdf
    • https://luriwoge.files.wordpress.com/2020/06/50708265954.pdf
    • https://kikibok.files.wordpress.com/2020/06/dederinosibovolaruvuja.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/sejil.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/ligumugazawebamupewav.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/75130531250.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/8861538602.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000060cc.bin
5f7d0d3ba18a8a46b437ac1d670708cf3acc53ed909f5cff86fcbd64d15a3cd7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60CC 4696 bytes
font_01_sfnt_off000070d2.bin
d82c6307a144d3dda2254e3dbd2d0ffa64f8bdeb013f9520f8e39a7649444763		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70D2 9876 bytes
font_02_sfnt_off000092f9.bin
3088de61ba4d2b01ab234d84e40a42107c4d30a52b1b9bdaf8961d49da71d313		 pdf-font-stream PDF embedded font (sfnt) at offset 0x92F9 16076 bytes

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