Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e1ac1ec6cf107ef…

MALICIOUS

PDF

51.4 KB Created: 2020-08-04 08:09:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a34b3d43f12c95b841dfc69a912cfce6 SHA-1: 3e7a2a1fa349498c6aaaaef21041de8f93c03dbd SHA-256: 8e1ac1ec6cf107efc0d7da2fad263236f7f5af1d4c740fde1450ac52e6c6bd1c
150 Risk Score

Malware Insights

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

The PDF contains numerous links to external resources, with one specifically identified as a malicious redirector. The document body, though partially corrupted, includes the URL 'https://ttraff.cc/pify?keyword=introduction+of+calculus+pdf', suggesting a lure to a malicious site disguised as a calculus PDF. The presence of a large number of external PDF links, many hosted on Shopify, indicates a link farm strategy. No scripts were extracted from this sample.

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=introduction+of+calculus+pdf
    • http://files.uplift.ccsdtitle1.org/uploads/1/3/1/6/131606056/84e99949.pdf
    • http://files.sitcon.sk/uploads/1/3/0/7/130776891/mafas.pdf
    • http://files.dionnisproperty.com/uploads/1/3/2/8/132814241/1441354.pdf
    • http://ganuli.birdvillemarchingfestival.com/uploads/1/3/0/8/130814535/7028955.pdf
    • http://files.fernando-guimaraes.com/uploads/1/3/0/9/130969710/livuwibuwev.pdf
    • https://cdn.shopify.com/s/files/1/0431/3251/8549/files/14158912168.pdf
    • https://cdn.shopify.com/s/files/1/0439/4654/1211/files/luninuke.pdf
    • https://cdn.shopify.com/s/files/1/0434/0537/7701/files/63676009825.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/46676539889.pdf
    • https://cdn.shopify.com/s/files/1/0437/6671/0429/files/orange_marmalade_webtoon.pdf
    • https://cdn.shopify.com/s/files/1/0429/5249/1159/files/6765556976.pdf
    • https://cdn.shopify.com/s/files/1/0431/1695/3767/files/wopumekuseziz.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/zupapinited.pdf
    • https://cdn.shopify.com/s/files/1/0431/8907/6117/files/84233089590.pdf
    • https://cdn.shopify.com/s/files/1/0435/6079/6318/files/63856156569.pdf
    • https://cdn.shopify.com/s/files/1/0431/8845/3533/files/manakitezukulifuxiso.pdf
    • https://cdn.shopify.com/s/files/1/0433/7837/6867/files/50338886450.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_off00007521.bin
708fcade1a31b0e68e3be875bfd97a9c2d9f21831455cb82d0b08acb3b95b5b4
pdf-font-stream PDF embedded font (sfnt) at offset 0x7521 4852 bytes
font_01_sfnt_off0000859e.bin
c15063bc6a8ce0ed69041c0e392e34c148cc3a58c32df9ccea59f7fda0d0dc56
pdf-font-stream PDF embedded font (sfnt) at offset 0x859E 14228 bytes
font_02_sfnt_off0000b268.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c
pdf-font-stream PDF embedded font (sfnt) at offset 0xB268 4324 bytes