Malicious PDF — malware analysis report

Static analysis result for SHA-256 e448d21046ba226b…

MALICIOUS

PDF

36.8 KB Created: 2020-08-29 23:53:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2aa1ec37579ee7a08ac9bd30db7d0fb4 SHA-1: c0bc4a96ae3b809a9dedaa03692ed949eeb252e5 SHA-256: e448d21046ba226ba67a1602cc7ee527c61d1e7df20f67348e4f59b19eec32fa
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.me/wix?keyword=windows+server+2012+iso'. This URL is presented within the document body, suggesting a lure for users to download or access something related to 'Windows server 2012 iso'. The presence of a PDF link farm further indicates an attempt to distribute malicious content or traffic. 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=windows+server+2012+iso
    • https://static.usrfiles.com/ugd/b8c837_7af8bd65cb784c87af0e8e52cf512c72.pdf
    • https://static.usrfiles.com/ugd/b8c837_467f2dc5953d4a34aabb7284f47b995b.pdf
    • https://static.usrfiles.com/ugd/b8c837_4ecdb13adb7c4b1888c2f9531758d173.pdf
    • https://static.usrfiles.com/ugd/e8506d_faf1ecd89dcc4c2891e0947ed5cc6f84.pdf
    • https://static.usrfiles.com/ugd/b8c837_c93680be0c0b429e94243db76bad95db.pdf
    • https://static.usrfiles.com/ugd/b8c837_36c78c968f154f5b879f84f6daa6a2bb.pdf
    • https://static.usrfiles.com/ugd/565485_82be80af57c4443ba537e6ad88156d31.pdf
    • https://static.usrfiles.com/ugd/1d64af_b2276e8e8bc141d1b8aa0b633b9337c8.pdf
    • https://static.usrfiles.com/ugd/ab059d_d3b394fa644e491a99b8b110385a1922.pdf
    • https://static.usrfiles.com/ugd/738632_dda9bedec32c43fe85e2332afe394ec9.pdf
    • https://cdn.shopify.com/s/files/1/0437/6264/7189/files/98938402984.pdf
    • https://cdn.shopify.com/s/files/1/0427/9736/7452/files/picsart_old_version_2017.pdf
    • https://cdn.shopify.com/s/files/1/0434/0105/2310/files/52076457374.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_off00005397.bin
ea29395204d982cef3bf2d8c01bcf3c3dd3c217e0d26891d279e747ad3314ea4
pdf-font-stream PDF embedded font (sfnt) at offset 0x5397 5068 bytes
font_01_sfnt_off0000650b.bin
64ad517f227fca749aaea7ef0d019a5053556340ba79bb77f543e462c345040b
pdf-font-stream PDF embedded font (sfnt) at offset 0x650B 9772 bytes