Malicious PDF — malware analysis report

Static analysis result for SHA-256 752e74e69a5d4bae…

MALICIOUS

PDF

51.1 KB Created: 2020-08-06 17:56:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2600d604c96fc05b848357b50fc359fb SHA-1: 2346e68c17ceb16d1fdfc52993dceecacf5943a3 SHA-256: 752e74e69a5d4baeb687c6489a3500dfb32bf0e26b4421794f12efa6b35e6106
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm and a redirector URL, indicating an attempt to lead users to malicious content. The ML classifier strongly flagged this PDF as malicious. The primary malicious IOC is the redirector URL, which likely serves as a gateway to a further stage of the attack.

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.cc/pify?keyword=d%25C3%25BCnya+haritas%25C4%25B1+siyasi+pdf
    • http://files.keepcalmwaxon.com/uploads/1/3/1/4/131437064/cc6a15.pdf
    • http://files.handmadebylouisa.com/uploads/1/3/1/4/131437474/paxubogorejoroges.pdf
    • http://files.stuartpeterman.com/uploads/1/3/1/4/131408371/5031814.pdf
    • http://files.heartfelthandsbirthservices.com/uploads/1/3/1/8/131871874/238722.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/1656/0550/files/50252173897.pdf
    • https://cdn.shopify.com/s/files/1/0428/1086/7871/files/tijepafidiroputogeruvomad.pdf
    • https://cdn.shopify.com/s/files/1/0431/4379/0760/files/47675297771.pdf
    • https://cdn.shopify.com/s/files/1/0437/9970/7810/files/lezifekituwofa.pdf
    • https://cdn.shopify.com/s/files/1/0432/0627/9332/files/togemakowabivifuku.pdf
    • https://cdn.shopify.com/s/files/1/0431/5450/5885/files/73926481575.pdf
    • https://cdn.shopify.com/s/files/1/0430/8815/0690/files/xeneto.pdf
    • https://cdn.shopify.com/s/files/1/0433/7644/3543/files/bomekoraxadadosa.pdf
    • https://cdn.shopify.com/s/files/1/0433/0009/4112/files/xedugutigikakavej.pdf
    • https://cdn.shopify.com/s/files/1/0438/9008/1960/files/27485744302.pdf
    • https://cdn.shopify.com/s/files/1/0433/0507/4838/files/zilogasosobelo.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000085c1.bin
ffd1aaf4e343dc7e090f42b1a5793ca320ef40a8d6bc83ff6b9aa8dff882fd71
pdf-font-stream PDF embedded font (sfnt) at offset 0x85C1 5352 bytes
font_01_sfnt_off000097cc.bin
222e0e7bee39c925dcd50bb173617578cf7e42a5c690cc6da1967a98f7a7d5ea
pdf-font-stream PDF embedded font (sfnt) at offset 0x97CC 12416 bytes