Malicious PDF — malware analysis report

Static analysis result for SHA-256 a357f6548106b471…

MALICIOUS

PDF

42.4 KB Created: 2020-08-19 07:16:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bfc878d6ec4118535d3dd2a02d011325 SHA-1: 1122284ae8789cd8cd936222452357523438524c SHA-256: a357f6548106b471816025d42eef18248c6fe456aca4035a350f32b9501ea770
128 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one identified as a malicious redirector. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK indicates that the link `https://ttraff.cc/pify?keyword=hiring+a+public+room+listening+answers` points to known malicious infrastructure. The presence of a "download button" lure and a large number of external PDF links suggests a campaign to drive traffic to potentially harmful sites. No scripts were extracted, but the primary attack vector appears to be social engineering via malicious links.

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.cc/pify?keyword=hiring+a+public+room+listening+answers
    • http://files.jweinsteinlaw.com/uploads/1/3/0/8/130813518/8556213.pdf
    • http://files.noosateardropflags.com/uploads/1/3/1/1/131164473/renovarok.pdf
    • http://files.westonsupermaretrainshow.com/uploads/1/3/1/3/131397938/jumekulatom.pdf
    • https://cdn.shopify.com/s/files/1/0438/5413/5456/files/boxopusokarural.pdf
    • https://cdn.shopify.com/s/files/1/0429/9735/0554/files/rimujituxikuzinagoxumedij.pdf
    • https://cdn.shopify.com/s/files/1/0428/8158/1223/files/yamaha_g1_golf_cart_parts.pdf
    • https://cdn.shopify.com/s/files/1/0433/6176/3480/files/types_of_capacitors_and_their_uses.pdf
    • https://cdn.shopify.com/s/files/1/0430/3287/1074/files/bncc_matemtica_ensino_mdio.pdf
    • https://cdn.shopify.com/s/files/1/0435/1993/4628/files/1669028783.pdf
    • https://cdn.shopify.com/s/files/1/0432/4625/6295/files/caballo_de_troya_1_jerusalen_descargar.pdf
    • https://cdn.shopify.com/s/files/1/0437/8954/9726/files/creepshow_3_alice_true_form.pdf
    • https://cdn.shopify.com/s/files/1/0440/8547/7541/files/89176530696.pdf
    • https://cdn.shopify.com/s/files/1/0430/4230/8250/files/lanthanides_and_actinides_properties.pdf
    • https://cdn.shopify.com/s/files/1/0428/0346/2303/files/nevexovukudedapufefetele.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_off0000677e.bin
017d0f31b7a29e85ffcd14e1c9f4bcee0e0f69d23a37fcc128c58fcd35770978
pdf-font-stream PDF embedded font (sfnt) at offset 0x677E 5448 bytes
font_01_sfnt_off000079e9.bin
a01629d5fc36e753e64d8ab4cdc9ce62e4daa0498cdf66dfee2949fc0a11da94
pdf-font-stream PDF embedded font (sfnt) at offset 0x79E9 10260 bytes