Malicious PDF — malware analysis report

Static analysis result for SHA-256 25a652eaacfedae9…

MALICIOUS

PDF

78.1 KB Created: 2020-08-12 12:39:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 91df8469e96a409cdc399143e9a32cfc SHA-1: 5daf64229d716b2369c089fb6b731ea4c83e981b SHA-256: 25a652eaacfedae9923024be5517d45d6c30360dccbc103d631385322194c9c9
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.com/pify?keyword=que+es+el+enlace+quimico+pdf'. Additionally, the document exhibits characteristics of a link farm, with numerous embedded URLs, many of which are hosted on Shopify. The document body, though heavily corrupted, contains the same redirector URL, suggesting a deliberate attempt to disguise malicious content within a seemingly innocuous PDF. No scripts were extracted, and the primary threat appears to be the redirection to malicious infrastructure.

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=que+es+el+enlace+quimico+pdf
    • http://pejibiz.lopatswimming.org/uploads/1/3/0/8/130814124/1b1c796d653c6b.pdf
    • http://files.aussiestingrays.com/uploads/1/3/0/9/130969740/9656696.pdf
    • http://vegefixan.macaelstone.com/uploads/1/3/0/8/130813528/guvipereb.pdf
    • http://raruxu.sagemitigation.com/uploads/1/3/0/8/130814229/1696278.pdf
    • http://files.theatelierllc.com/uploads/1/3/1/8/131856392/tivumesemutadefiveru.pdf
    • https://cdn.shopify.com/s/files/1/0430/0128/2711/files/tigozirexotozojujapa.pdf
    • https://cdn.shopify.com/s/files/1/0446/4692/4451/files/canciones_infantiles_guitarra.pdf
    • https://cdn.shopify.com/s/files/1/0431/5335/8999/files/13464490960.pdf
    • https://cdn.shopify.com/s/files/1/0437/7129/7943/files/22729883109.pdf
    • https://cdn.shopify.com/s/files/1/0431/7410/1160/files/sadatifilopukifedib.pdf
    • https://cdn.shopify.com/s/files/1/0428/8207/2732/files/59622381398.pdf
    • https://cdn.shopify.com/s/files/1/0433/7673/8462/files/21892681628.pdf
    • https://cdn.shopify.com/s/files/1/0440/4586/1014/files/nekorefer.pdf
    • https://cdn.shopify.com/s/files/1/0431/4519/9784/files/6333497151.pdf
    • https://cdn.shopify.com/s/files/1/0433/4852/5208/files/95081529401.pdf
    • https://cdn.shopify.com/s/files/1/0439/0017/4504/files/zawofesufolumivo.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_off0000da81.bin
6e4e2cfd4f53d37583dc1d92bad8744d1f7588b64d968871f89fc368d8dc467f
pdf-font-stream PDF embedded font (sfnt) at offset 0xDA81 5392 bytes
font_01_sfnt_off0000ecc5.bin
bea33e8068df2d5eda4a7072babf88735e2d93d303de243c8e38ddbbe510b2fa
pdf-font-stream PDF embedded font (sfnt) at offset 0xECC5 12100 bytes
font_02_sfnt_off0001143b.bin
f7a15deb181bd1ce6552dea8ae01306019deb00e3e6bd24b2d2d72dc6ec7592f
pdf-font-stream PDF embedded font (sfnt) at offset 0x1143B 16128 bytes