Malicious PDF — malware analysis report

Static analysis result for SHA-256 a773b424c20ab21c…

MALICIOUS

PDF

35.5 KB Created: 2020-07-15 19:32:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6ff27a97f6be62eb84ae567ff1f2bdd7 SHA-1: dd82f9d6cf85ea749946c10a2706bacf6795d9cc SHA-256: a773b424c20ab21c1a8ddd24a12113ec3ece5ada95d3d53980d725ea148236f4
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, with the primary heuristic identifying a malicious redirector. The document body is heavily obfuscated, but the presence of the URL 'https://ttraff.ru/wb?keyword=verb%20to%20be%20test%20pdf' strongly suggests a malicious redirection attempt. The file also exhibits characteristics of an SEO link farm, indicating a potential attempt to manipulate search engine results or distribute malicious content through a large number of links.

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.ru/wb?keyword=verb%20to%20be%20test%20pdf
    • http://files.pmuelling.com/uploads/1/3/0/7/130775520/9638114.pdf
    • http://files.hamiltonproperties.net/uploads/1/3/1/3/131398220/wugosusobevuvokaf.pdf
    • http://files.techniquejobs.com/uploads/1/3/2/7/132710624/3138880.pdf
    • http://files.aucklandpolo.com/uploads/1/3/1/3/131382032/ziseweseboduloso.pdf
    • http://files.hamiltonproperties.net/uploads/1/3/1/3/131398220/wugosusobevuvok
    • https://cdn.shopify.com/s/files/1/0429/6350/1222/files/48676154512.pdf
    • https://cdn.shopify.com/s/files/1/0430/4296/3613/files/kijanovobajerinelaxeruraz.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/94662163826.pdf
    • https://cdn.shopify.com/s/files/1/0431/0846/6845/files/zopixoritanupumesexejozu.pdf
    • https://cdn.shopify.com/s/files/1/0432/2266/3325/files/noborogok.pdf
    • https://nifubija.files.wordpress.com/2020/07/mexagirupudipifa.pdf
    • https://weteritisomu.files.wordpress.com/2020/06/55233974912.pdf
    • https://genirun.files.wordpress.com/2020/07/13500278919.pdf
    • https://wafosagejam.files.wordpress.com/2020/07/zekanavademorerag.pdf
    • https://cdn.shopify.com/s/files/1/0433/7372/3800/files/genumodijisetewepikezod.pdf
    • https://cdn.shopify.com/s/files/1/0428/6083/9079/files/47656028537.pdf
    • https://cdn.shopify.com/s/files/1/0432/3033/1040/files/42398242861.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/51025654711.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/60233972239.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/fuwakuda.pdf
    • https://cdn.shopify.com/s/files/1/0434/7291/2549/files/pifobapokobudapena.pdf
    • https://cdn.shopify.com/s/files/1/0430/8749/5322/files/lowusuxazisububabamebotoz.pdf
    • https://cdn.shopify.com/s/files/1/0429/1634/8057/files/tegesozaxedonugafanunep.pdf
    • https://cdn.shopify.com/s/files/1/0432/2725/0850/files/duzezejumasop.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005f16.bin
db56683ed064cfa33588a6322fda9638afc046a001ef7e4ea9a21bef5d9b2139
pdf-font-stream PDF embedded font (sfnt) at offset 0x5F16 4532 bytes
font_01_sfnt_off00006e84.bin
80ecea655251b3e509efda605ab3416455eb79b80151b784fb0c6fa7a51c0ccc
pdf-font-stream PDF embedded font (sfnt) at offset 0x6E84 9524 bytes