Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd2528c308f2e2b6…

MALICIOUS

PDF

45.7 KB Created: 2020-08-09 07:45:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6c17f6991bccd0d5f4012e6116f20e8e SHA-1: 4c721ffe08c64d32a87c259135d81750a4f77864 SHA-256: fd2528c308f2e2b6c374c03d796dff6f4bfbc01431aa6e447d4c66c9096d70ae
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.com/pify?keyword=adjectives+pdf+files'. Additionally, it exhibits a PDF link farm heuristic, embedding numerous links to external PDFs hosted on domains like cdn.shopify.com. The document body, though heavily obfuscated, contains references to these URLs, suggesting a social engineering attempt to drive traffic to malicious infrastructure.

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=adjectives+pdf+files
    • http://files.corneliagerhardt.com/uploads/1/3/2/8/132814898/sadafigojevita.pdf
    • http://files.sawdustcreativekits.com/uploads/1/3/0/7/130739731/fogixasomo-liwumavelazanu-dusizavutokav.pdf
    • http://files.wvrra.org/uploads/1/3/1/4/131406390/wexirubo_besuka.pdf
    • http://files.southtownscatholic.org/uploads/1/3/1/6/131636990/3996155.pdf
    • http://files.andreanelson.studio/uploads/1/3/1/8/131871690/b02bc.pdf
    • https://cdn.shopify.com/s/files/1/0434/0203/5352/files/22792673915.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/30151397197.pdf
    • https://cdn.shopify.com/s/files/1/0431/6617/1296/files/begudivofijagit.pdf
    • https://cdn.shopify.com/s/files/1/0430/9345/9093/files/jexiwukonerime.pdf
    • https://cdn.shopify.com/s/files/1/0437/3587/5749/files/buku_agama_islam_kelas_11_kurikulum_2020_erlangga.pdf
    • https://cdn.shopify.com/s/files/1/0435/3461/4688/files/71395059056.pdf
    • https://cdn.shopify.com/s/files/1/0429/8624/2209/files/xuwodi.pdf
    • https://cdn.shopify.com/s/files/1/0430/8933/0330/files/18052344986.pdf
    • https://cdn.shopify.com/s/files/1/0435/5103/1447/files/gefazuburevagulupesari.pdf
    • https://cdn.shopify.com/s/files/1/0432/3826/0898/files/ggplot_axis_labels_rotate.pdf
    • https://cdn.shopify.com/s/files/1/0434/5161/3336/files/80729819156.pdf
    • https://cdn.shopify.com/s/files/1/0428/2236/9446/files/lilozex.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/32377204601.pdf
    • https://cdn.shopify.com/s/files/1/0439/4339/5483/files/asturias_leyenda_piano.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_off00006d98.bin
e88443b14e86e4d13991448cb855da87db39bf6dffcfcd92cd5b657ce7a18dc3
pdf-font-stream PDF embedded font (sfnt) at offset 0x6D98 1572 bytes
font_01_sfnt_off0000759c.bin
3925f1e122cc8077c78d955002b54847fb8e51adcfa91614f49e4ef178bea361
pdf-font-stream PDF embedded font (sfnt) at offset 0x759C 4968 bytes
font_02_sfnt_off000086af.bin
c2fe2d57e6e6cbb2b66eaaafb0d8dddcf3071c541e8bda07bb445a64081e9ca8
pdf-font-stream PDF embedded font (sfnt) at offset 0x86AF 10148 bytes