Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3bde9acfa1577e7…

MALICIOUS

PDF

65.2 KB Created: 2020-08-22 21:05:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 95e44bd6738591e0e59596e0f936e6eb SHA-1: a33889e7fb848e3a5c294d215efd6ded1bf952e3 SHA-256: a3bde9acfa1577e71970eac30a81544c12dad4839f1015854a581c99c13edc5f
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains a mass of external links, including a critical redirector link to 'ttraff.com'. The document body, though heavily obfuscated, contains text suggesting a lure related to 'brain exercise games'. The primary malicious indicator is the redirector URL, which is likely used to funnel victims to a phishing or malware distribution site. The presence of numerous Shopify-hosted PDF files suggests a link farm used for SEO poisoning to improve the ranking of the malicious redirector.

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=brain+exercise+games+free
    • http://xubikutuz.fixiology.org/uploads/1/3/1/8/131871390/sorupavetunosek-luluwuxenalori.pdf
    • http://files.bbkart.com/uploads/1/3/1/0/131070581/zosuginuzazofo_dopemoxe_goduzul.pdf
    • https://cdn.shopify.com/s/files/1/0429/8178/5753/files/fawikebotatubekizokefej.pdf
    • https://cdn.shopify.com/s/files/1/0435/7036/4571/files/siterakoz.pdf
    • https://cdn.shopify.com/s/files/1/0436/1958/2110/files/7420135617.pdf
    • https://cdn.shopify.com/s/files/1/0428/0070/9791/files/potewipabeludufifa.pdf
    • https://cdn.shopify.com/s/files/1/0431/6741/6488/files/3751913076.pdf
    • https://cdn.shopify.com/s/files/1/0432/1237/4174/files/briggs_and_stratton_intek_problems.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vidabuvuwegorowomilamum.pdf
    • https://cdn.shopify.com/s/files/1/0433/4462/5813/files/intensifying_adverbs_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0433/4606/7621/files/gejuzunexisad.pdf
    • https://cdn.shopify.com/s/files/1/0433/8312/8214/files/wozodiketuwunubenabini.pdf
    • https://cdn.shopify.com/s/files/1/0462/3823/6826/files/mumenup.pdf
    • https://cdn.shopify.com/s/files/1/0434/5528/3367/files/artikel_akuntansi_biaya.pdf
    • https://cdn.shopify.com/s/files/1/0432/3839/1970/files/jigsaw_table_with_fret_saw_guide.pdf
    • https://cdn.shopify.com/s/files/1/0433/9495/7475/files/95425974603.pdf
    • https://cdn.shopify.com/s/files/1/0427/6604/1244/files/60222038051.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_off0000b491.bin
8d8a51a0f763b940e7d83b3240df084036ae7578d87baeb345af89fd714cc781
pdf-font-stream PDF embedded font (sfnt) at offset 0xB491 4884 bytes
font_01_sfnt_off0000c506.bin
5ad0e94079e7f152e63f11965f109a5dec3e121c499f6b7f40102f2c8042e1b7
pdf-font-stream PDF embedded font (sfnt) at offset 0xC506 10580 bytes
font_02_sfnt_off0000e91e.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333
pdf-font-stream PDF embedded font (sfnt) at offset 0xE91E 4324 bytes