Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6da063c2e0de479…

MALICIOUS

PDF

39.3 KB Created: 2020-08-10 03:35:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ab9f9b9e0faeb5578865d032193442b4 SHA-1: e99855083cbc00d5eef858b14bba7c7d4d614880 SHA-256: f6da063c2e0de479e0a1f5b037d2760211cb4e8efb26a1f66b9ed2e436779ff9
128 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.com/pify?keyword=sikalastic+710+pdf'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links, many hosted on cdn.shopify.com. The presence of a 'download button' heuristic further suggests a lure to click these links. The document body, though heavily obfuscated, contains the primary malicious URL and several other benign-looking Shopify URLs, likely used to mask the malicious activity. No scripts were extracted from this sample.

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=sikalastic+710+pdf
    • http://files.divreitorahofvien.com/uploads/1/3/1/3/131381612/vawofuxa.pdf
    • http://files.sciencewithcondit.com/uploads/1/3/1/3/131379732/keguwe.pdf
    • http://files.bgcjcga.org/uploads/1/3/1/4/131408103/96e2f994.pdf
    • http://files.decadesboutique.com/uploads/1/3/1/8/131856883/jimekur.pdf
    • http://files.apexbait.com/uploads/1/3/1/4/131406736/safatuzo-xanilopakepuk-veneges.pdf
    • https://cdn.shopify.com/s/files/1/0434/7628/7648/files/45627839165.pdf
    • https://cdn.shopify.com/s/files/1/0428/5405/6095/files/yale_forklift_manual_free.pdf
    • https://cdn.shopify.com/s/files/1/0432/3734/3387/files/counselling_skills_for_managers_kavita_singh.pdf
    • https://cdn.shopify.com/s/files/1/0429/2873/4367/files/gopivix.pdf
    • https://cdn.shopify.com/s/files/1/0428/3082/3583/files/dusixotegazuwatujama.pdf
    • https://cdn.shopify.com/s/files/1/0431/9143/5422/files/mabijoxisum.pdf
    • https://cdn.shopify.com/s/files/1/0446/6756/8291/files/catalysis_by_organometallic_compounds.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/69440205977.pdf
    • https://cdn.shopify.com/s/files/1/0436/9983/0952/files/shurflo_4008_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/8229/3152/files/gaxititar.pdf
    • https://cdn.shopify.com/s/files/1/0437/4567/3377/files/33541970923.pdf
    • https://cdn.shopify.com/s/files/1/0431/0145/4496/files/assessment_for_learning_tools.pdf
    • https://cdn.shopify.com/s/files/1/0431/9733/3664/files/88270972481.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004eec.bin
826b3a85d1b13a697273950a370d04018d59695e2242198e6b72d64a061df2e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4EEC 4948 bytes
font_01_sfnt_off00005fcb.bin
a6873e9faaae938f39c37d3f7c9c1176d3ce58f3849ccc4125023a87355f9f15		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FCB 10148 bytes
font_02_sfnt_off0000828a.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x828A 4324 bytes

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