Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c7aa7b3b45eec15…

MALICIOUS

PDF

47.9 KB Created: 2020-08-10 19:13:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a1d70ea60b458f79d79c6fb9dd31ee7c SHA-1: ddf4494bd490c00a8f2a28568b54c68a532f8db4 SHA-256: 7c7aa7b3b45eec1584c947babc8f1dd03f8c0616821c818d4970818ff4e259d3
150 Risk Score

Malware Insights

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

The PDF contains a high number of embedded links, with the primary link pointing to a known malicious redirector. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains URLs that are likely part of a link farm or redirection scheme designed to lure users to malicious sites.

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.ru/pify?keyword=anacalypsis+pdf+espa%25C3%25B1ol
    • http://files.elderhollingsworth.com/uploads/1/3/2/3/132303351/f2d75.pdf
    • http://vitefi.unifor4000fr.com/uploads/1/3/2/8/132814930/6923659.pdf
    • http://riluki.chantalquincy.com/uploads/1/3/2/6/132695829/zedikof_remogi_xuvise_sinizulo.pdf
    • http://files.accssfn.com/uploads/1/3/2/8/132814972/6819840.pdf
    • http://rusez.geraldineandnicholas.com/uploads/1/3/2/6/132681824/wiwepul_zumurepijogu.pdf
    • https://cdn.shopify.com/s/files/1/0441/0382/7608/files/37560228998.pdf
    • https://cdn.shopify.com/s/files/1/0434/4722/2422/files/kopagixowefurimevufor.pdf
    • https://cdn.shopify.com/s/files/1/0432/6942/3269/files/26240027612.pdf
    • https://cdn.shopify.com/s/files/1/0437/5959/9777/files/chemistry_the_central_science_9th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0428/9665/4489/files/bamatutanagoruraziwibed.pdf
    • https://cdn.shopify.com/s/files/1/0428/5192/6183/files/20151792305.pdf
    • https://cdn.shopify.com/s/files/1/0441/0051/8040/files/tevojutusijagimixumagu.pdf
    • https://cdn.shopify.com/s/files/1/0431/4267/6648/files/red_werewolf_hunter.pdf
    • https://cdn.shopify.com/s/files/1/0430/5453/0709/files/12655462867.pdf
    • https://cdn.shopify.com/s/files/1/0427/8085/2383/files/18034317669.pdf
    • https://cdn.shopify.com/s/files/1/0434/0216/6435/files/debovukakikakudab.pdf
    • https://cdn.shopify.com/s/files/1/0438/3241/0272/files/96599806199.pdf
    • https://cdn.shopify.com/s/files/1/0431/2875/0241/files/lipejopebeseworuvekazusez.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_off00006c87.bin
c066e168eebec6d89c57b824e2f662584d992764702481217c9e06551bd173bf
pdf-font-stream PDF embedded font (sfnt) at offset 0x6C87 5064 bytes
font_01_sfnt_off00007d8b.bin
e1986a151a2f4f266980abf317e7d98042045bb3c01577fe5d86024ee328be3d
pdf-font-stream PDF embedded font (sfnt) at offset 0x7D8B 11176 bytes
font_02_sfnt_off0000a2e3.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2
pdf-font-stream PDF embedded font (sfnt) at offset 0xA2E3 4324 bytes