Malicious PDF — malware analysis report

Static analysis result for SHA-256 18e81f434f69510a…

MALICIOUS

PDF

35.2 KB Created: 2020-08-14 20:54:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1e72bc90665332ee013d6a88d8102bcd SHA-1: de35b118f3effe73c1d3428ea1364314dbb25719 SHA-256: 18e81f434f69510a1082d1c8905e1199f5b60832cafc375191b56185b3a07c4c
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links, including one pointing to a known malicious redirector (ttraff.com). The presence of a 'Download' button lure and the ML classifier's high confidence score indicate a malicious intent to redirect the user to harmful content. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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
  • 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.com/pify?keyword=good+morning+shayari+photos+hd
    • http://files.praxsym.com/uploads/1/3/0/7/130739369/7658774.pdf
    • http://sepik.traleeresponders.com/uploads/1/3/1/0/131070767/xesesum.pdf
    • http://files.roxieriverawriter.com/uploads/1/3/1/3/131378771/ripib.pdf
    • http://nikeje.brianmonteithart.com/uploads/1/3/1/4/131407370/63aff56ab59192.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/5943/7975/files/suzusavobutodar.pdf
    • https://cdn.shopify.com/s/files/1/0431/0476/4068/files/61604993773.pdf
    • https://cdn.shopify.com/s/files/1/0447/9988/5463/files/cy_country_code.pdf
    • https://cdn.shopify.com/s/files/1/0428/0408/4899/files/11849640942.pdf
    • https://cdn.shopify.com/s/files/1/0432/3645/8654/files/47466974782.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/55781022724.pdf
    • https://cdn.shopify.com/s/files/1/0434/6393/4109/files/71143919190.pdf
    • https://cdn.shopify.com/s/files/1/0440/7263/2470/files/39079009700.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_off00004cc8.bin
e3e3303377dad55d34f1a71b1328a1cde349620ed70d8a37a73078ade58f8f43
pdf-font-stream PDF embedded font (sfnt) at offset 0x4CC8 5472 bytes
font_01_sfnt_off00005f44.bin
4efa092934e9110883826ce6d2a1c4acec4d6aade184dc1d354d4f3126f3d84f
pdf-font-stream PDF embedded font (sfnt) at offset 0x5F44 9644 bytes