Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a95dbdbe7e3f542…

MALICIOUS

PDF

43.9 KB Created: 2020-07-29 22:27:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 44a75bdd9626559bc04953926c8f3749 SHA-1: ae5944ccebf9e787ee2896b5083b368774062a09 SHA-256: 1a95dbdbe7e3f542aa681b0cea9ce2af6a37c84093e695211fe468f0f4f6dc42
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, pointing to ttraff.com. It also exhibits characteristics of a link farm, with numerous external PDF links, many hosted on cdn.shopify.com. The document body, though heavily obfuscated, suggests a lure related to 'policy monitoring and evaluation pdf'. The primary malicious IOC is the redirector URL, which likely leads to a phishing or malware distribution site.

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.com/pify?keyword=policy+monitoring+and+evaluation+pdf
    • http://files.wichitafallsbridge.com/uploads/1/3/1/6/131606429/1806263.pdf
    • http://files.busybirdhandyman.com/uploads/1/3/1/4/131438240/1902109.pdf
    • http://files.nadiaremmerswaal.com/uploads/1/3/2/6/132683289/1320855.pdf
    • https://cdn.shopify.com/s/files/1/0438/4233/8981/files/kibitufafaxiv.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/32732230761.pdf
    • https://cdn.shopify.com/s/files/1/0434/1330/7541/files/riziselenefep.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/viborovikumowenaben.pdf
    • https://cdn.shopify.com/s/files/1/0433/3453/3275/files/40361238207.pdf
    • https://cdn.shopify.com/s/files/1/0433/7244/5854/files/5575267845.pdf
    • https://cdn.shopify.com/s/files/1/0430/5348/2135/files/girosolosisowufob.pdf
    • https://cdn.shopify.com/s/files/1/0440/3871/7605/files/55273387853.pdf
    • https://cdn.shopify.com/s/files/1/0437/2555/3815/files/55703014856.pdf
    • https://cdn.shopify.com/s/files/1/0431/3009/3728/files/23392668276.pdf
    • https://cdn.shopify.com/s/files/1/0433/1618/3205/files/64147817974.pdf
    • https://cdn.shopify.com/s/files/1/0432/0244/5475/files/bogetuwig.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006c78.bin
69fa84555352e9dd115a60fdc0ba0fc9ef24a65ee28c7ba08dd0db95fea553a3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C78 5344 bytes
font_01_sfnt_off00007e8d.bin
8ea61af1082e71c10e3f84499877caa5b0e82a7f6992e469cb143bc2cc40a3f7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E8D 10616 bytes

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