Malicious PDF — malware analysis report

Static analysis result for SHA-256 aec83ebe3fefa6b4…

MALICIOUS

PDF

46.7 KB Created: 2020-08-20 13:27:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ff2d9a7fca64a54d27073f69f6f62049 SHA-1: d2929413c04541a843cf3cfeb17877976d364ad7 SHA-256: aec83ebe3fefa6b4e9fe907f11073aaf3fc5f8e7dd3e8268c3ed8bddf7401802
120 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with one critical heuristic identifying a link to known malicious redirector infrastructure. The embedded URL leads to a redirector that uses a job application lure. The document body, though heavily obfuscated, contains the URL 'https://ttraff.cc/pify?keyword=sinhala+job+application+form+format+pdf', suggesting a phishing attempt.

Heuristics 3

  • 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.
  • 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=sinhala+job+application+form+format+pdf
    • http://safuje.justisville.com/uploads/1/3/0/7/130776889/056fe.pdf
    • https://cdn.shopify.com/s/files/1/0430/3316/5986/files/29426817789.pdf
    • https://cdn.shopify.com/s/files/1/0428/7240/6179/files/amazon_kindle_ebook_reader.pdf
    • https://cdn.shopify.com/s/files/1/0431/8812/5857/files/lotobab.pdf
    • https://cdn.shopify.com/s/files/1/0433/5616/0151/files/beautiful_creatures_2000.pdf
    • https://cdn.shopify.com/s/files/1/0438/5079/3122/files/99373948405.pdf
    • https://cdn.shopify.com/s/files/1/0443/8127/4278/files/mysql_for_mac.pdf
    • https://cdn.shopify.com/s/files/1/0431/4539/6386/files/29560433040.pdf
    • https://cdn.shopify.com/s/files/1/0435/2072/1055/files/lisatexefexotopuf.pdf
    • https://cdn.shopify.com/s/files/1/0433/8637/2246/files/natefe.pdf
    • https://cdn.shopify.com/s/files/1/0430/1458/6521/files/toml_vs_yaml.pdf
    • https://cdn.shopify.com/s/files/1/0433/5032/7451/files/watetenavazulikozin.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_off00004bec.bin
32b2fb3cfa64f42d3bd9e62416585cef8599d197b0440a22118e840b0ba3c6d8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4BEC 5536 bytes
font_01_sfnt_off00005e41.bin
d7c9f8ab7484c0434cbbb12e187e373c265601ceac2ce819161633ccaf6365d7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E41 17476 bytes
font_02_sfnt_off000089db.bin
8d7ab440d6b9393d183eac07ea3f692533970124299181aa04efc202820d419d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x89DB 9880 bytes

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