Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3072f5a4072b1a6…

MALICIOUS

PDF

66.9 KB Created: 2020-08-11 00:11:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d0a85ac13ed59732535e34b6ccd2fad9 SHA-1: aa1030e5a3895989fc9923aca98daeb32b3ea96b SHA-256: e3072f5a4072b1a69a2839670c2921c6378f6df5488b90abc2b8bf821760f39e
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. It also exhibits a link farm pattern, with numerous external PDF links, many hosted on 'cdn.shopify.com'. The ML classifier strongly indicates maliciousness. The embedded URL in the document body, 'https://ttraff.com/pify?keyword=cedaw+convention+text+pdf', is the primary indicator of the attack's intent, likely to lure users to a malicious site.

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/pify?keyword=cedaw+convention+text+pdf
    • http://files.yonah.sg/uploads/1/3/0/7/130740090/xirudakolobumefo.pdf
    • http://files.bvtfacts.com/uploads/1/3/1/3/131383727/binafawip-tebetoxoguge-sekiranekizen-xovujonaw.pdf
    • http://files.teresacarosa.com/uploads/1/3/1/4/131483830/tixuwaw-zebeto.pdf
    • http://winomi.ponderosabasinwater.com/uploads/1/3/2/6/132695829/3095442.pdf
    • https://cdn.shopify.com/s/files/1/0428/8207/2732/files/52413420100.pdf
    • https://cdn.shopify.com/s/files/1/0428/2685/8662/files/57410813027.pdf
    • https://cdn.shopify.com/s/files/1/0438/5452/8677/files/15685108211.pdf
    • https://cdn.shopify.com/s/files/1/0437/8286/5047/files/jirufuvakaka.pdf
    • https://cdn.shopify.com/s/files/1/0437/3735/0293/files/zifijalujigofu.pdf
    • https://cdn.shopify.com/s/files/1/0428/7427/3948/files/mijezakejubedegakatuzuvis.pdf
    • https://cdn.shopify.com/s/files/1/0432/9809/5262/files/makagitodidetuta.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/fufalelavajukunegaxiz.pdf
    • https://cdn.shopify.com/s/files/1/0429/1392/3228/files/tig_welding_machine_specification.pdf
    • https://cdn.shopify.com/s/files/1/0433/4416/7064/files/69441975418.pdf
    • https://cdn.shopify.com/s/files/1/0436/3033/0016/files/86020749265.pdf
    • https://cdn.shopify.com/s/files/1/0432/5982/2244/files/flash_ms_pacman.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_off0000caa9.bin
5214338649bab27f8303af34aea891eee42f6addeb933cd21d3f03d4509f3d1d
pdf-font-stream PDF embedded font (sfnt) at offset 0xCAA9 4968 bytes
font_01_sfnt_off0000dbc4.bin
20a5409d739510ce320a440a872d11d1967e6ec8f4325e35fbda221a773a4c42
pdf-font-stream PDF embedded font (sfnt) at offset 0xDBC4 10160 bytes