Malicious PDF — malware analysis report

Static analysis result for SHA-256 54a55a39203bd55a…

MALICIOUS

PDF

46.5 KB Created: 2020-08-07 06:04:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a435db0a126793a9aa872aef805a6f6e SHA-1: 1d6c37e4fea3d4c45665fdf566b1cf4ea49374b3 SHA-256: 54a55a39203bd55a9828b51055442cb40b4697cc93941c30085e3579be20389c
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. The document body, though heavily obfuscated, contains the URL https://ttraff.cc/pify?keyword=exercice+d+orthographe+cm2+pdf, which is likely intended to lead the user to malicious content. The presence of numerous external PDF links suggests a link farm or SEO poisoning tactic to distribute the 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=exercice+d+orthographe+cm2+pdf
    • http://files.victoriangardenscattery.com/uploads/1/3/0/9/130969981/bivirubusej-xomozifoxubipu.pdf
    • http://files.sandiegodoodles.com/uploads/1/3/2/6/132683252/1120655.pdf
    • http://files.lacinefest.org/uploads/1/3/0/7/130740624/1232464.pdf
    • http://files.rivershillcoc.org/uploads/1/3/0/7/130738741/gidilizipu.pdf
    • http://files.basilicatareview.com/uploads/1/3/0/7/130738951/1510656970b.pdf
    • https://cdn.shopify.com/s/files/1/0435/1629/7368/files/fazuzodupawituritup.pdf
    • https://cdn.shopify.com/s/files/1/0432/4527/3251/files/27264901873.pdf
    • https://cdn.shopify.com/s/files/1/0432/9717/7768/files/ruganeturumaxapubi.pdf
    • https://cdn.shopify.com/s/files/1/0432/1335/7214/files/bedowewokufedunuvok.pdf
    • https://cdn.shopify.com/s/files/1/0431/3127/3365/files/28039935515.pdf
    • https://cdn.shopify.com/s/files/1/0435/3789/1480/files/bekugubafajamat.pdf
    • https://cdn.shopify.com/s/files/1/0434/0957/1990/files/68812668909.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/pajovi.pdf
    • https://cdn.shopify.com/s/files/1/0432/1656/8482/files/ranitemakulividitutok.pdf
    • https://cdn.shopify.com/s/files/1/0434/9237/6741/files/xixukuterukomavetipila.pdf
    • https://cdn.shopify.com/s/files/1/0429/6186/2810/files/nakukekiwizerod.pdf
    • https://cdn.shopify.com/s/files/1/0432/3888/3495/files/tekelitudarirumeb.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_off0000645c.bin
cc8b22cae56236d4ba9234a0fbae8e2830eb50cf9d58bff43e338d9533e2ad53
pdf-font-stream PDF embedded font (sfnt) at offset 0x645C 5200 bytes
font_01_sfnt_off00007619.bin
0f0eb3bda1c450a03afbf006a9c9ca0aaf78addbdd5cc11714e94b50106fa409
pdf-font-stream PDF embedded font (sfnt) at offset 0x7619 12720 bytes
font_02_sfnt_off00009d40.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c
pdf-font-stream PDF embedded font (sfnt) at offset 0x9D40 4324 bytes