Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4f0824ae88baf62…

MALICIOUS

PDF

41.2 KB Created: 2020-08-02 09:09:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e2cd06965969cbbbfd31b3ccf5cdf2d4 SHA-1: 7aa85ab60b055a2cd5109c698371186c9ec67ad3 SHA-256: c4f0824ae88baf62158bc59fdad1a6f85815198a230394f7e67a855d4ba1274c
154 Risk Score

Malware Insights

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

The PDF document was flagged by a critical heuristic for linking to known malicious redirector infrastructure. Additionally, it contains a mass external PDF link farm, with many links pointing to Shopify domains, suggesting an attempt to distribute malicious content or phish users. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the extensive link farm is sufficient evidence of a malicious intent to redirect users.

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=varalakshmi+vratam+puja+vidhanam
    • http://files.fairbankshomeless.org/uploads/1/3/1/3/131398517/1386487.pdf
    • http://files.heritageelementarypto.org/uploads/1/3/0/7/130776206/mameni.pdf
    • http://files.dovecotemissions.com/uploads/1/3/0/9/130969356/vajan.pdf
    • http://files.itsyoursnapshot.com/uploads/1/3/1/4/131406337/vofopoxoge_zosawufir.pdf
    • http://files.kdhodges.com/uploads/1/3/2/7/132740321/5360778.pdf
    • https://cdn.shopify.com/s/files/1/0432/7571/4715/files/pevifuvekotosujunogo.pdf
    • https://cdn.shopify.com/s/files/1/0430/1609/3849/files/71558357502.pdf
    • https://cdn.shopify.com/s/files/1/0440/3704/6437/files/dadiwazazixijipij.pdf
    • https://cdn.shopify.com/s/files/1/0436/0932/5730/files/50448374455.pdf
    • https://cdn.shopify.com/s/files/1/0431/3769/5895/files/3304484703.pdf
    • https://cdn.shopify.com/s/files/1/0432/0329/7438/files/59173401639.pdf
    • https://cdn.shopify.com/s/files/1/0431/8072/0294/files/bijadijigefuzuridibi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/84574839703.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/talijofazejodo.pdf
    • https://cdn.shopify.com/s/files/1/0437/3456/5025/files/jitow.pdf
    • https://cdn.shopify.com/s/files/1/0433/0219/1269/files/pazupuda.pdf
    • https://cdn.shopify.com/s/files/1/0433/8827/2807/files/52869117283.pdf
    • https://cdn.shopify.com/s/files/1/0432/2518/6466/files/jefekes.pdf
    • https://cdn.shopify.com/s/files/1/0436/9140/9562/files/7322450393.pdf
    • https://cdn.shopify.com/s/files/1/0431/4179/1900/files/kutenesilofiromeropano.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_off000062ed.bin
25c46593c699ef9a8d778d77fd6c41289f78d0018d443a1bc14097255bcbe5b1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62ED 5364 bytes
font_01_sfnt_off0000750c.bin
4181157020062b054c4535f834ccf4547436e91a9b57944326a36962238d204a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x750C 10028 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.