Malicious PDF — malware analysis report

Static analysis result for SHA-256 931dd16cfb4d3c0b…

MALICIOUS

PDF

37.6 KB Created: 2020-09-07 18:04:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6ff816b6ffc2c33740b3eb90493fc6e1 SHA-1: 2c134ee4e77221f40a5b3876d774a1281130a796 SHA-256: 931dd16cfb4d3c0be34b3bbea978bcdf7a298d4f9f59f56c35b23473f4b3c8da
128 Risk Score

Malware Insights

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

The PDF file contains a link that redirects to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though partially corrupted, contains text suggesting a lure for 'Facebook messenger for nokia e63' and a call-to-action phrase, aligning with social engineering tactics. The PDF_SEO_LINK_FARM heuristic indicates a large number of external links, further supporting a malicious intent to drive traffic to potentially harmful sites.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.link/wix?keyword=facebook+messenger++for+nokia+e63
    • https://static.usrfiles.com/ugd/a382ee_d0e48f78f0b548f0af95a3e3d2d7fcc1.pdf
    • https://static.usrfiles.com/ugd/ea5d7b_f86ea526fb3b4d15be0ba1385dc89d65.pdf
    • https://static.usrfiles.com/ugd/10e3af_2ceef3b2ad604860a86da39770fa69d0.pdf
    • https://static.usrfiles.com/ugd/d5415a_7034fb1943744a0e8eede970ec99995e.pdf
    • https://cdn.shopify.com/s/files/1/0452/3973/0336/files/rujadopuw.pdf
    • https://cdn.shopify.com/s/files/1/0430/2582/5955/files/17268573498.pdf
    • https://cdn.shopify.com/s/files/1/0439/4044/6366/files/tujubonevewes.pdf
    • https://cdn.shopify.com/s/files/1/0437/6828/3294/files/pevevowireraduwun.pdf
    • https://cdn.shopify.com/s/files/1/0431/4556/0220/files/temirukumoxizoxejotezokav.pdf
    • https://cdn.shopify.com/s/files/1/0435/2340/8032/files/29144485779.pdf
    • https://cdn.shopify.com/s/files/1/0435/4048/0164/files/26611908200.pdf
    • https://cdn.shopify.com/s/files/1/0434/1058/7800/files/godomagowazoluzoxidedid.pdf
    • https://cdn.shopify.com/s/files/1/0440/7522/1144/files/bazidotabuwafonozidudifeb.pdf
    • https://cdn.shopify.com/s/files/1/0432/7899/1513/files/carol_of_the_bells_piano_free.pdf
    • https://static.usrfiles.com/ugd/7dd30d_ff10e0c8a9ac407dbd077d90933f7431.pdf
    • https://static.usrfiles.com/ugd/b8c837_3dac4885cae74fe98de15f9e456ff1ae.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_off0000540f.bin
426248e917f9b2b7b298fc2e0715b023a9be42e09ac1c7105b9627fa423b6b8a
pdf-font-stream PDF embedded font (sfnt) at offset 0x540F 5644 bytes
font_01_sfnt_off00006738.bin
db6d28718b4b01ef5ea045b4f4cc2f66687d674152d2731e562e8576c281d446
pdf-font-stream PDF embedded font (sfnt) at offset 0x6738 10060 bytes