Malicious PDF — malware analysis report

Static analysis result for SHA-256 473d315b8b98a2ed…

MALICIOUS

PDF

36.4 KB Created: 2020-08-04 19:07:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 993a2a55e9693776d2aaacab02b76062 SHA-1: e93682e02bd72c3f3d0e64a1e6b64191fcf77d03 SHA-256: 473d315b8b98a2edb957749229f9cea0ac4d9ced67622e46d43ab09cc574385d
150 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, many of which are part of a link farm designed to appear as legitimate search results for technical documents. One prominent link, disguised as a search result for 'analysis of algorithms an active learning approach 2nd edition pdf', redirects through 'ttraff.com', a known malicious redirector. This suggests a social engineering tactic to lure users to malicious infrastructure under the guise of providing academic or technical content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=analysis+of+algorithms+an+active+learning+approach+2nd+edition+pdf
    • http://files.cts44.com/uploads/1/3/0/8/130815014/bisixerazum.pdf
    • http://files.acc-hsg.org/uploads/1/3/1/4/131452842/9134435.pdf
    • http://files.airestdion.com/uploads/1/3/0/9/130969260/a04e805.pdf
    • http://nuwixunun.nmctkd.com/uploads/1/3/1/4/131438137/5394653.pdf
    • http://files.hosannadance.com/uploads/1/3/1/4/131406068/wepetozem.pdf
    • https://cdn.shopify.com/s/files/1/0429/0461/7119/files/40401714663.pdf
    • https://cdn.shopify.com/s/files/1/0431/8858/4605/files/42841261777.pdf
    • https://cdn.shopify.com/s/files/1/0439/0558/1211/files/vevawobatinomet.pdf
    • https://cdn.shopify.com/s/files/1/0447/3444/7770/files/hibbeler_dynamics_14th_edition_solutions.pdf
    • https://cdn.shopify.com/s/files/1/0431/0794/2549/files/lefozozabekefowixoxuwenag.pdf
    • https://cdn.shopify.com/s/files/1/0430/7678/0192/files/60408377034.pdf
    • https://cdn.shopify.com/s/files/1/0432/7361/7576/files/18378426603.pdf
    • https://cdn.shopify.com/s/files/1/0431/5702/9018/files/2008_odyssey_service_manual.pdf
    • https://cdn.shopify.com/s/files/1/0435/2753/6799/files/zalozanuzavisegupejod.pdf
    • https://cdn.shopify.com/s/files/1/0431/0571/4338/files/89907773979.pdf
    • https://cdn.shopify.com/s/files/1/0437/5740/4318/files/41657769869.pdf
    • https://cdn.shopify.com/s/files/1/0431/6479/5044/files/vejumabagon.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zabaravoxetifup.pdf
    • https://cdn.shopify.com/s/files/1/0427/7328/2983/files/kamudaf.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_off00004ddc.bin
5a8a3e25ff7f6270710bcc30e87cd503aafb23dd6195d72faa83cea5b7f9927e
pdf-font-stream PDF embedded font (sfnt) at offset 0x4DDC 5852 bytes
font_01_sfnt_off000061b9.bin
db29e61099c7db56d477fba720eb1f446abe70c3544e79ab59811a78c581473c
pdf-font-stream PDF embedded font (sfnt) at offset 0x61B9 10068 bytes