Malicious PDF — malware analysis report

Static analysis result for SHA-256 0cdc2dbd0346751b…

MALICIOUS

PDF

53.7 KB Created: 2020-08-09 21:31:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ccce566d2196a4b934b0b92c934d70df SHA-1: 5cff6e5d97ecb49285c9edd75afba6636356d977 SHA-256: 0cdc2dbd0346751b9e2c973bdea76dd774f80b9cecb08ae7e5a1b7e1fc1ca44f
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to Shopify domains hosting other PDFs, suggesting a link farm or SEO manipulation tactic. One critical heuristic identified a link to a known malicious redirector infrastructure at 'https://ttraff.cc/pify?keyword=yankees+2020+printable+schedule+pdf'. This indicates an attempt to lure users to malicious content under the guise of a schedule.

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=yankees+2020+printable+schedule+pdf
    • http://files.fabellamusic.com/uploads/1/3/0/8/130814043/pololowaf_wawetosifaw_meginoburoma_nunuvomulezedos.pdf
    • http://files.lauraavnaim.com/uploads/1/3/0/9/130969819/0ec2ee5.pdf
    • http://files.zuzubeanpress.com/uploads/1/3/0/8/130813528/9931321.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/7220/0608/files/kasusapijuwisoto.pdf
    • https://cdn.shopify.com/s/files/1/0431/0981/0327/files/69847466321.pdf
    • https://cdn.shopify.com/s/files/1/0450/7097/5128/files/cephalometrics_for_orthognathic_surgery.pdf
    • https://cdn.shopify.com/s/files/1/0431/1361/1421/files/xitasidexojuxafekimakem.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/refitapobofubogiwimubik.pdf
    • https://cdn.shopify.com/s/files/1/0435/8314/4104/files/69568756595.pdf
    • https://cdn.shopify.com/s/files/1/0428/6863/7862/files/lezonibapibiga.pdf
    • https://cdn.shopify.com/s/files/1/0434/8834/6262/files/jovudelizokoxav.pdf
    • https://cdn.shopify.com/s/files/1/0432/2613/6743/files/sidokopebezagariru.pdf
    • https://cdn.shopify.com/s/files/1/0437/6893/8647/files/38622607857.pdf
    • https://cdn.shopify.com/s/files/1/0433/2060/6885/files/zagum.pdf
    • https://cdn.shopify.com/s/files/1/0434/4751/7349/files/pedupusomizadagoru.pdf
    • https://cdn.shopify.com/s/files/1/0430/3519/7602/files/49452575593.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009393.bin
f2944bdb1f9e7f82962463409e2f81a068122a1e0eaa82f81c078ebba566db1c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9393 5680 bytes
font_01_sfnt_off0000a6db.bin
8a5e99f966c7afee210e11b5360396e0fd3ee2fd3833760019bd2e408ec05a2d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA6DB 10272 bytes

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