Malicious PDF — malware analysis report

Static analysis result for SHA-256 9613d759ccfeec81…

MALICIOUS

PDF

44.8 KB Created: 2020-07-21 03:30:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6b2d819e00bc84094ef5207b7805e51a SHA-1: 01fd891ac4fcc362b6a88bfb2672063c19543bfc SHA-256: 9613d759ccfeec812bc7da0f48f4eda96c4b3c9d0ad495253d2f52eb01089486
120 Risk Score

Malware Insights

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

The PDF file was identified as malicious due to the presence of numerous embedded links. One critical heuristic firing indicates a link to a known malicious redirector infrastructure at 'https://ttraff.com/wb?keyword=typha%20domingensis%20pdf'. Another critical heuristic indicates a PDF link farm with 19 external PDF links, many hosted on cdn.shopify.com, suggesting an attempt at SEO manipulation or traffic redirection. The document body contains garbled text, indicating it is not intended for direct user consumption but rather as a container for these links.

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/wb?keyword=typha%20domingensis%20pdf
    • http://files.infinityequestrian.com/uploads/1/3/1/6/131606815/zutalisugi_benexeseje_weziwe.pdf
    • http://files.lelrr.org/uploads/1/3/0/7/130740493/686c9a7.pdf
    • http://files.katlynsampsonphotography.com/uploads/1/3/1/4/131437832/xilub.pdf
    • https://gobokavuxa
    • https://cdn.shopify.com/s/files/1/0427/9838/3260/files/17705594775.pdf
    • https://cdn.shopify.com/s/files/1/0431/6649/8965/files/noferenuzi.pdf
    • https://cdn.shopify.com/s/files/1/0431/7570/6788/files/60405244537.pdf
    • https://cdn.shopify.com/s/files/1/0431/3631/9639/files/14706940843.pdf
    • https://sudumol.files.wordpress.com/2020/07/goxozepolipowolosivutojop.pdf
    • https://gobokavuxa.files.wordpress.com/2020/07/tiwopajimamewo.pdf
    • https://kusizewatam.files.wordpress.com/2020/07/35593648182.pdf
    • https://marulagotov532150104.files.wordpress.com/2020/07/naxademijerapizipavom.pdf
    • https://wazutiwivagu.files.wordpress.com/2020/07/vobukidevidusisa.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/70945418412.pdf
    • https://cdn.shopify.com/s/files/1/0429/3269/9295/files/20423590761.pdf
    • https://cdn.shopify.com/s/files/1/0427/8022/9791/files/32326352221.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/77603652905.pdf
    • https://cdn.shopify.com/s/files/1/0427/5588/3175/files/90994932643.pdf
    • https://cdn.shopify.com/s/files/1/0439/9602/0894/files/suzos.pdf
    • https://cdn.shopify.com/s/files/1/0435/2881/4741/files/17431524308.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_off0000725a.bin
189d192a46a57cf95f617bda0a2efec8355a8fd5c179dc18990faae42e2dc488
pdf-font-stream PDF embedded font (sfnt) at offset 0x725A 5088 bytes
font_01_sfnt_off0000838a.bin
1f4661fdf562c58d6dc08ff584c4a3444d572303f691de35459cbdfd61dfd45f
pdf-font-stream PDF embedded font (sfnt) at offset 0x838A 10108 bytes