Malicious PDF — malware analysis report

Static analysis result for SHA-256 daeb805b87c1dde2…

MALICIOUS

PDF

54.5 KB Created: 2020-08-20 03:54:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 08bcc975dbf976192a8f81b1eb80d115 SHA-1: 7dd26c5a3cfb33e7f4180b0792e5690f644883fb SHA-256: daeb805b87c1dde26a0bb58ca79eb810619c7c6ceaa46a48c4bbec18bd2abd04
152 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with a critical heuristic firing for a malicious redirector at 'https://ttraff.com/pify?keyword=wordpress+template+hierarchy+chart'. Another critical heuristic identified a PDF link farm, with the primary link pointing to 'https://cdn.shopify.com/s/files/1/0429/2945/5271/files/rejabid.pdf'. The document body, though heavily obfuscated, contains references to the lure 'Wordpress template hierarchy chart' and the authoring tool 'wkhtmltopdf', suggesting a social engineering attempt to drive traffic to malicious infrastructure.

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.com/pify?keyword=wordpress+template+hierarchy+chart
    • http://files.fixerinturkey.com/uploads/1/3/1/1/131163832/nesuxotedopog.pdf
    • http://sedamuji.videopost.in/uploads/1/3/1/6/131636789/d3faf8.pdf
    • https://cdn.shopify.com/s/files/1/0429/2945/5271/files/rejabid.pdf
    • https://cdn.shopify.com/s/files/1/0431/9405/6861/files/11744207951.pdf
    • https://cdn.shopify.com/s/files/1/0434/4040/6684/files/lefanemobapidasixazuzovus.pdf
    • https://cdn.shopify.com/s/files/1/0441/1644/3288/files/encyclopedia_britannica_en_espaol.pdf
    • https://cdn.shopify.com/s/files/1/0439/4627/9080/files/fanuc_arc_mate_100i_manual.pdf
    • https://cdn.shopify.com/s/files/1/0429/1900/2268/files/semuxozedebutitumu.pdf
    • https://cdn.shopify.com/s/files/1/0431/2865/1938/files/matrix_hair_color_chart.pdf
    • https://cdn.shopify.com/s/files/1/0433/2906/1032/files/pluralisme_hukum_waris_di_indonesia.pdf
    • https://cdn.shopify.com/s/files/1/0432/3747/4466/files/34624676035.pdf
    • https://cdn.shopify.com/s/files/1/0431/6086/2882/files/34407860762.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007282.bin
eb2d6f5fdb073abe17684a831742bd008cf6b961a6da9f573c6e2a86221b68e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7282 5108 bytes
font_01_sfnt_off000083ed.bin
88eb28f8339a47efffb94a6129a6854aa882d53cba8a90959b0334dc304b1443		 pdf-font-stream PDF embedded font (sfnt) at offset 0x83ED 10800 bytes
font_02_sfnt_off0000a8bd.bin
c3d0ee408bee49a88931d2ac630a9fb52e88a46fabab5a72aa19e78bbe1d3826		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA8BD 16376 bytes
font_03_sfnt_off0000be65.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBE65 4324 bytes

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