Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2532e6ff9f13b43…

MALICIOUS

PDF

49.7 KB Created: 2020-08-12 12:47:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0410641f4937f3b3e16cc2ad687c3fd4 SHA-1: 49cca55d8e96bd4378f8dfd98006267dd220194b SHA-256: b2532e6ff9f13b435b52d999bc0b0483c53c3c7a8da145de2ffa464e46f0f13a
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 critical heuristic identifying a link to known malicious redirector infrastructure at 'ttraff.com'. The document body, though heavily obfuscated, contains this URL and appears to be a lure related to 'Ashrae psychrometric chart pdf'. The presence of a link farm and a visual download button further supports a malicious intent to redirect users to potentially harmful content. No scripts were extracted, limiting the analysis of direct payload execution.

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.com/pify?keyword=ashrae+psychrometric+chart+pdf
    • http://files.itselementarymydear.com/uploads/1/3/1/3/131379183/kigot_makonulunurajo_feputikav.pdf
    • http://files.annmaidscleaning.com/uploads/1/3/1/4/131453384/ac0dc55d3.pdf
    • http://files.stnicholasbuccleuch.org.uk/uploads/1/3/1/8/131871994/5008149.pdf
    • https://cdn.shopify.com/s/files/1/0433/5117/9423/files/mentor_graphics_calibre_user_guide.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/27039997465.pdf
    • https://cdn.shopify.com/s/files/1/0431/5637/3670/files/insertional_achilles_tendinopathy_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0428/0870/5187/files/91423178604.pdf
    • https://cdn.shopify.com/s/files/1/0448/2321/6290/files/asterix_und_kleopatra_deutsch.pdf
    • https://cdn.shopify.com/s/files/1/0434/6406/5188/files/68258196255.pdf
    • https://cdn.shopify.com/s/files/1/0432/8099/0366/files/zigolivemokabe.pdf
    • https://cdn.shopify.com/s/files/1/0435/0106/0262/files/control_de_crecimiento_microbiano.pdf
    • https://cdn.shopify.com/s/files/1/0432/2990/5058/files/3415149353.pdf
    • https://cdn.shopify.com/s/files/1/0431/2412/9952/files/wunuwiwafufefag.pdf
    • https://cdn.shopify.com/s/files/1/0433/9000/9502/files/21221975277.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_off00008213.bin
40552240329d2468553302740fe78de3107ed642646026cf4383e734fecec6c4
pdf-font-stream PDF embedded font (sfnt) at offset 0x8213 5456 bytes
font_01_sfnt_off0000947d.bin
0776b44bf9a3460c21ff4a9fbc47afd4bed3ca85c1837a89fb34a3f2d8a7c99e
pdf-font-stream PDF embedded font (sfnt) at offset 0x947D 10960 bytes