Malicious PDF — malware analysis report

Static analysis result for SHA-256 a090ca940aeadccb…

MALICIOUS

PDF

56.1 KB Created: 2020-08-14 08:45:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2e2902ed88e4c074c625ed51ac9ad153 SHA-1: 7ce809d75b030ea90929ca1f9eb1a2c76377ac22 SHA-256: a090ca940aeadccbf5e11d6329073d4926f16002e02ed483b3dd84c244e99439
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, including one pointing to a known malicious redirector at 'https://ttraff.cc/pify?keyword=ads1115+module+datasheet'. The document body, though malformed, also contains this URL, suggesting an attempt to lure users to malicious sites under the guise of providing technical information. The ML classifier strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=ads1115+module+datasheet
    • http://files.slightlykneady.com/uploads/1/3/1/0/131069789/5367275.pdf
    • http://files.aerospades.com/uploads/1/3/0/7/130775953/ec1d2b9bdb346.pdf
    • http://files.cornerstonekilmartin.com/uploads/1/3/1/4/131482952/0524288c.pdf
    • http://womivepet.naramatachildcare.com/uploads/1/3/1/6/131607600/6371825.pdf
    • http://foruteki.clbmg.com/uploads/1/3/1/4/131410812/wonalezasafo-juzilovazal-teregimapeg.pdf
    • https://cdn.shopify.com/s/files/1/0437/4927/7845/files/tijifumapumipugikofi.pdf
    • https://cdn.shopify.com/s/files/1/0429/8558/6849/files/wogepagipe.pdf
    • https://cdn.shopify.com/s/files/1/0432/6539/2804/files/8353185923.pdf
    • https://cdn.shopify.com/s/files/1/0435/3510/6203/files/gimugusosabavubimoduwogit.pdf
    • https://cdn.shopify.com/s/files/1/0429/9830/0823/files/encyclopedia_of_home_remedies_for_better_life.pdf
    • https://cdn.shopify.com/s/files/1/0432/6211/6008/files/51576444939.pdf
    • https://cdn.shopify.com/s/files/1/0434/1478/2103/files/wefulabivufidarefo.pdf
    • https://cdn.shopify.com/s/files/1/0435/3707/2280/files/ansi_c_download_free.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/56773010908.pdf
    • https://cdn.shopify.com/s/files/1/0431/0804/0853/files/66441068802.pdf
    • https://cdn.shopify.com/s/files/1/0430/6262/4417/files/fopiwonogujakofutego.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009004.bin
9c678f68f6931da35edfe769bc0db2f810e2ab1949f16578bef070fab20350b9
pdf-font-stream PDF embedded font (sfnt) at offset 0x9004 5136 bytes
font_01_sfnt_off0000a166.bin
964cf5f294e54be18d374a820a43358d101a45bf4e83a0165a2e9d53e69e8a18
pdf-font-stream PDF embedded font (sfnt) at offset 0xA166 15296 bytes