Malicious PDF — malware analysis report

Static analysis result for SHA-256 79ad0a753d5f0be7…

MALICIOUS

PDF

44.5 KB Created: 2020-08-10 01:26:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6d78da964e67c8361ccc190ed5b52604 SHA-1: acfb0523c73e13f00377262e7b86a28742d5ca87 SHA-256: 79ad0a753d5f0be77404f7c9727ecbe5487db2fb01ddf2400487ae75a202a341
120 Risk Score

Malware Insights

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

The PDF contains a link farm and a malicious redirector, indicating an attempt to lure users to malicious sites. The primary malicious URL identified is https://ttraff.com/pify?keyword=astm+standards+for+stainless+steel+pdf. The document body, though heavily obfuscated, contains references to ASTM standards and the wkhtmltopdf application, suggesting a lure to technical documentation.

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=astm+standards+for+stainless+steel+pdf
    • http://files.aplyon.com/uploads/1/3/0/7/130775195/5356404.pdf
    • http://semune.zollthai.com/uploads/1/3/0/7/130775768/da9533228e7.pdf
    • http://mukavuzo.annajackson.nz/uploads/1/3/0/7/130776485/9720708.pdf
    • https://cdn.shopify.com/s/files/1/0430/8995/2922/files/fanisudugivu.pdf
    • https://cdn.shopify.com/s/files/1/0433/7618/1400/files/lelivasezas.pdf
    • https://cdn.shopify.com/s/files/1/0432/2990/5058/files/60818267002.pdf
    • https://cdn.shopify.com/s/files/1/0434/4928/6817/files/resmed_cpap_manual.pdf
    • https://cdn.shopify.com/s/files/1/0432/5313/7576/files/wewekelerodegazix.pdf
    • https://cdn.shopify.com/s/files/1/0431/3153/5524/files/mesirotas.pdf
    • https://cdn.shopify.com/s/files/1/0428/7840/2723/files/18567117962.pdf
    • https://cdn.shopify.com/s/files/1/0431/7492/0347/files/sepix.pdf
    • https://cdn.shopify.com/s/files/1/0433/9132/0214/files/meditejusowefiwop.pdf
    • https://cdn.shopify.com/s/files/1/0429/8804/4442/files/pikuguv.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_off00007036.bin
1f32688b751a58cef48990db7750c661466a35a058cc78986b62916cbfd45afc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7036 5176 bytes
font_01_sfnt_off000081bd.bin
ca4139f8602dc1808a69c00a655e249962b05c18cbd10d1def43274e73a649b0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x81BD 10440 bytes

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