Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a8ae4acdb05a0cd…

MALICIOUS

PDF

63.3 KB Created: 2020-08-09 17:31:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4a6e3cfe22ed3d11b1ea72974bfb69d1 SHA-1: d29571925413f29f284d83c2871a161d2943b058 SHA-256: 8a8ae4acdb05a0cdc7dcf20be2c0ef99b3488eb0c53389eaada8c3bb1f7467b9
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.ru'. This URL is presented within the document body, disguised as a calculus formula PDF. The file also exhibits a PDF link farm heuristic, indicating a large number of outbound links, many of which are to benign Shopify domains, likely for SEO manipulation. The primary malicious IOC is the redirector URL.

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/pify?keyword=all+formulas+of+calculus+class+12+pdf
    • http://files.theshrubberyllc.com/uploads/1/3/1/4/131406269/197277.pdf
    • http://files.elainejagielski.com/uploads/1/3/2/8/132814071/sewagizuj.pdf
    • http://files.nextgenerationcordblood.org/uploads/1/3/1/4/131437930/kogutozubovimurew.pdf
    • http://files.megan-livingston.com/uploads/1/3/0/7/130739288/lumaro_geseru_videnubetuz.pdf
    • https://cdn.shopify.com/s/files/1/0429/1664/2975/files/68021509620.pdf
    • https://cdn.shopify.com/s/files/1/0427/7708/4070/files/exercise_and_cardiovascular_health.pdf
    • https://cdn.shopify.com/s/files/1/0434/0049/5260/files/kuzemuberixotagakalad.pdf
    • https://cdn.shopify.com/s/files/1/0452/4238/4545/files/pathophysiology_of_hearing.pdf
    • https://cdn.shopify.com/s/files/1/0429/6628/6490/files/xulol.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kupenase.pdf
    • https://cdn.shopify.com/s/files/1/0435/2373/5720/files/bodepajovirizadikesefama.pdf
    • https://cdn.shopify.com/s/files/1/0437/1313/4757/files/98821047064.pdf
    • https://cdn.shopify.com/s/files/1/0432/7427/2924/files/wii64_channel_forwarder.pdf
    • https://cdn.shopify.com/s/files/1/0428/2338/5247/files/lazixazuxobelebilu.pdf
    • https://cdn.shopify.com/s/files/1/0428/5048/4390/files/rational_choice_theory_summary.pdf
    • https://cdn.shopify.com/s/files/1/0428/1594/6911/files/nunojiponalu.pdf
    • https://cdn.shopify.com/s/files/1/0429/9508/9559/files/les_affaires_criminelles_les_plus_clbres.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/
    • https://cdn.shopify.com/s/files/1/0427/7

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009381.bin
0dbfee3cd551172511fec88626a348014983791ee594b3e16c62aa3848a0229b
pdf-font-stream PDF embedded font (sfnt) at offset 0x9381 5472 bytes
font_01_sfnt_off0000a60e.bin
f3a95b24cb0996f176829d3b866f3a419ad5a14f27f1708bc33f3aa3aaff2573
pdf-font-stream PDF embedded font (sfnt) at offset 0xA60E 16532 bytes
font_02_sfnt_off0000d991.bin
bc775481b3234384b148fecb09583cee6edbe2a3f99fb4a17f3c618959311435
pdf-font-stream PDF embedded font (sfnt) at offset 0xD991 16340 bytes