Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e3a558ee8a2f849…

MALICIOUS

PDF

44.8 KB Created: 2020-08-23 11:13:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 43073cd9380480cb22a4cf2eee48d78c SHA-1: d320d5350313eccd659c25192426dae8bbe72a2d SHA-256: 9e3a558ee8a2f8493578cd3d62f3515f2526ccd982b77b1f366bf56195dfb1e9
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, which is also present in the document body. This link, 'https://ttraff.cc/pify?keyword=delivering+results+interview+questions+and+answers', is designed to lure users into clicking it under the guise of interview preparation. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs pointing to external resources, including the aforementioned malicious redirector and several benign Shopify links. No scripts were extracted from this sample.

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=delivering+results+interview+questions+and+answers
    • http://mivumobi.inspire2transform.org/uploads/1/3/1/1/131163898/giwimejijezezi.pdf
    • http://fopom.bridgeportcf.org/uploads/1/3/1/8/131871787/1802088.pdf
    • http://files.mattmtong.com/uploads/1/3/2/6/132682338/ac5d2d0ef.pdf
    • https://cdn.shopify.com/s/files/1/0431/1141/5965/files/92782623056.pdf
    • https://cdn.shopify.com/s/files/1/0428/2207/4534/files/c_chrono_timer.pdf
    • https://cdn.shopify.com/s/files/1/0428/6667/1782/files/10946483905.pdf
    • https://cdn.shopify.com/s/files/1/0429/3482/9223/files/kibajalegadafonosi.pdf
    • https://cdn.shopify.com/s/files/1/0434/0452/5720/files/50485725653.pdf
    • https://cdn.shopify.com/s/files/1/0450/4512/1182/files/expressions_equations_and_inequalities.pdf
    • https://cdn.shopify.com/s/files/1/0438/8575/6568/files/pasuguvozufe.pdf
    • https://cdn.shopify.com/s/files/1/0439/4015/1454/files/73376800272.pdf
    • https://cdn.shopify.com/s/files/1/0429/5557/1353/files/illinois_annual_report_form_14._05.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/lunizededalusabunis.pdf
    • https://cdn.shopify.com/s/files/1/0431/4556/0225/files/kusuw.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/34888362351.pdf
    • https://cdn.shopify.com/s/files/1/0437/1664/0919/files/atoms_isotopes_and_ions_worksheet_answer.pdf
    • https://cdn.shopify.com/s/files/1/0432/4923/8178/files/venizolebaveni.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_off000063eb.bin
cca42a184eb455744796c37550b8955f3f0f102d057a6c3c0949da0c9c2da616
pdf-font-stream PDF embedded font (sfnt) at offset 0x63EB 5152 bytes
font_01_sfnt_off00007589.bin
a78f643f048c7806c2e2d3b81de716c41840b73deb8d4633b894e286146e602b
pdf-font-stream PDF embedded font (sfnt) at offset 0x7589 9996 bytes
font_02_sfnt_off000097b8.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c
pdf-font-stream PDF embedded font (sfnt) at offset 0x97B8 4324 bytes