Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f448cddb3bf8c6f…

MALICIOUS

PDF

38.1 KB Created: 2020-08-05 15:47:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4ac77cb1f0ea8c5a51b4a005d60a937a SHA-1: 1db8a616a50217017ce035d2a1d2ab2ce304d59f SHA-256: 8f448cddb3bf8c6f0c6e106b207fedcebaa62859cd1a7e3ef6f8b401943faaa0
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, but one critical link directs to a known malicious redirector. This suggests a link farm or SEO poisoning tactic designed to drive traffic to malicious infrastructure. The document body, though heavily obfuscated, contains the URL that triggers the malicious redirector, indicating the primary intent is to lead the user to a harmful site. No scripts were extracted, limiting the analysis of further stages.

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=close+to+you+carpenters+piano+pdf
    • http://files.amyziserevents.com/uploads/1/3/1/8/131856270/2b8e1fc.pdf
    • http://files.glasgowag.org/uploads/1/3/1/6/131636946/6612477.pdf
    • http://files.benetvolleyball.org/uploads/1/3/1/8/131857115/1964443.pdf
    • http://files.grittygoblingames.com/uploads/1/3/2/7/132712006/nibabonulunuvuvu.pdf
    • https://cdn.shopify.com/s/files/1/0433/5471/8358/files/wivirojem.pdf
    • https://cdn.shopify.com/s/files/1/0438/5452/8677/files/zonolepiwajojetomuvip.pdf
    • https://cdn.shopify.com/s/files/1/0434/6180/4197/files/86739509953.pdf
    • https://cdn.shopify.com/s/files/1/0432/7496/1059/files/96041688905.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/42228357160.pdf
    • https://cdn.shopify.com/s/files/1/0429/1110/5183/files/weather_underground_south_lake_tahoe.pdf
    • https://cdn.shopify.com/s/files/1/0432/0532/9064/files/9573463478.pdf
    • https://cdn.shopify.com/s/files/1/0431/6617/1296/files/turojeviwejojagudiba.pdf
    • https://cdn.shopify.com/s/files/1/0434/3365/6476/files/el_bullying_escolar_libros.pdf
    • https://cdn.shopify.com/s/files/1/0429/0802/4985/files/tokutivugiwe.pdf
    • https://cdn.shopify.com/s/files/1/0430/0609/9605/files/vunujabejamabutojipa.pdf
    • https://cdn.shopify.com/s/files/1/0431/7754/1787/files/28406552326.pdf
    • https://cdn.shopify.com/s/files/1/0434/3326/3253/files/89487748081.pdf
    • https://cdn.shopify.com/s/files/1/0435/6613/7507/files/kenenajipaforiruzove.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_off000049b7.bin
36b286b169ea8212dee37bacbb7e7a3db34b4d726acf864581982b5041fdf249
pdf-font-stream PDF embedded font (sfnt) at offset 0x49B7 5156 bytes
font_01_sfnt_off00005b56.bin
e0471e33480251bd70c81068c68e2ef5cb78e659744a96069b2140b9587bb809
pdf-font-stream PDF embedded font (sfnt) at offset 0x5B56 9720 bytes
font_02_sfnt_off00007cbd.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3
pdf-font-stream PDF embedded font (sfnt) at offset 0x7CBD 4324 bytes