Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a9aa8268f32ec49…

MALICIOUS

PDF

52.0 KB Created: 2020-07-31 13:19:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9b304d5417d7403be46ddfb479eb8023 SHA-1: 7db623909cb87b11fed02cbe936d24cbbed94b1b SHA-256: 9a9aa8268f32ec496f756355a774fc59a760dd44c7056e448c583b0b2d14f3a9
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to ttraff.cc. Additionally, it features a PDF link farm with 16 external links, many hosted on Shopify. The document body, though heavily obfuscated, suggests a lure related to 'bread making recipes pdf'. The primary malicious IOC is the redirector URL, which is likely used to funnel victims to further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=bread+making+recipes+pdf
    • http://files.rutherglenlamaisonstarnaud.com/uploads/1/3/1/3/131382274/3857754.pdf
    • http://files.asimpleido.com/uploads/1/3/0/9/130969185/nisupoluzojovo_lidorujowof.pdf
    • http://files.crossborneotour.com/uploads/1/3/1/4/131409498/jukugeniwefageto.pdf
    • http://files.mmandmcatering.com/uploads/1/3/2/6/132681452/7fa74c.pdf
    • http://files.ekleonline.com/uploads/1/3/0/9/130969265/79e8bf25.pdf
    • http://files.mmandmcatering.com/uploads/1/3/2/6/1326
    • https://cdn.shopify.com/s/files/1/0429/1539/7788/files/39385233644.pdf
    • https://cdn.shopify.com/s/files/1/0439/5696/1438/files/firozifagowinodobubape.pdf
    • https://cdn.shopify.com/s/files/1/0430/3932/6365/files/rimofosusus.pdf
    • https://cdn.shopify.com/s/files/1/0437/8840/2839/files/durasuxijaxilikivokusido.pdf
    • https://cdn.shopify.com/s/files/1/0431/3032/3095/files/jagapiwojimeforopimiluzo.pdf
    • https://cdn.shopify.com/s/files/1/0431/5922/4480/files/woxinilegu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tulajemo.pdf
    • https://cdn.shopify.com/s/files/1/0433/9659/5870/files/geseburixexekele.pdf
    • https://cdn.shopify.com/s/files/1/0437/4098/7544/files/lijox.pdf
    • https://cdn.shopify.com/s/files/1/0431/9094/3904/files/lagafatawojulujujuduro.pdf
    • https://cdn.shopify.com/s/files/1/0434/3683/4981/files/sudiwawipobuzimux.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_off000078a0.bin
35b2786e2fe1a5bddad0d533baded7c154987e1ec4698a3191292fc7b2c75ae2
pdf-font-stream PDF embedded font (sfnt) at offset 0x78A0 5156 bytes
font_01_sfnt_off00008a07.bin
dab27fc7a8f634f31aa4ac5f4dbb4558aaf37769a4cbedb61f77a77d3151ec61
pdf-font-stream PDF embedded font (sfnt) at offset 0x8A07 10048 bytes
font_02_sfnt_off0000ac9b.bin
0a2507360a40dd56b84230664db2b3a2689cb34b0aa642599c8245950ba374cb
pdf-font-stream PDF embedded font (sfnt) at offset 0xAC9B 16304 bytes