Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa4aa0a89393fa08…

MALICIOUS

PDF

51.9 KB Created: 2020-08-04 01:20:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 86ecdb9f4ff599149c097a7aef26e768 SHA-1: fd5906fb7a41c81e813700d48b05f743bbf84083 SHA-256: fa4aa0a89393fa08a1946ca12860f7fd39feaef35b489e8a8ea9a43c8d785ff6
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to Shopify domains hosting other PDFs, suggesting a link farm for SEO manipulation. One critical heuristic firing indicates a direct link to a known malicious redirector at 'https://ttraff.com/pify?keyword=english+speaking+topics+with+answers+pdf'. This suggests the document's primary purpose is to redirect users to malicious infrastructure, likely for further exploitation or phishing. No scripts were extracted from this sample.

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=english+speaking+topics+with+answers+pdf
    • http://files.roots-and-wings-academy.com/uploads/1/3/0/7/130740211/wiwibaj.pdf
    • http://files.tatendadalu.com/uploads/1/3/1/8/131856917/vozisobarudoratav.pdf
    • http://files.bakersarmory.com/uploads/1/3/1/6/131636969/e2d4afdc816a.pdf
    • https://cdn.shopify.com/s/files/1/0429/8774/9525/files/7448400737.pdf
    • https://cdn.shopify.com/s/files/1/0434/2962/6017/files/75167321193.pdf
    • https://cdn.shopify.com/s/files/1/0431/8032/7076/files/13627996573.pdf
    • https://cdn.shopify.com/s/files/1/0428/7699/3702/files/97091360096.pdf
    • https://cdn.shopify.com/s/files/1/0430/6498/3703/files/85213379126.pdf
    • https://cdn.shopify.com/s/files/1/0433/1785/4373/files/14994804379.pdf
    • https://cdn.shopify.com/s/files/1/0435/1570/7551/files/dejavoo_z11_manual.pdf
    • https://cdn.shopify.com/s/files/1/0428/3439/5295/files/wofufexafile.pdf
    • https://cdn.shopify.com/s/files/1/0429/1257/9747/files/ratusonixokebesiliniris.pdf
    • https://cdn.shopify.com/s/files/1/0430/7006/2754/files/mewitemiwiravotaxanomo.pdf
    • https://cdn.shopify.com/s/files/1/0433/5874/8837/files/povopuzoxupubije.pdf
    • https://cdn.shopify.com/s/files/1/0435/0102/7493/files/graph_in_latex.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_off00007d6a.bin
6b392a9f2d14a2e2afedba9d75cbe35b4eb8507e279addc1a9e17912c68ac4c0
pdf-font-stream PDF embedded font (sfnt) at offset 0x7D6A 5320 bytes
font_01_sfnt_off00008f82.bin
51c140c5f068bd748f1ba205f8a782b96e24864e2929e097fe92b3372ab3b365
pdf-font-stream PDF embedded font (sfnt) at offset 0x8F82 10720 bytes
font_02_sfnt_off0000b3f9.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e
pdf-font-stream PDF embedded font (sfnt) at offset 0xB3F9 4324 bytes