Malicious PDF — malware analysis report

Static analysis result for SHA-256 70699b12ce16d497…

MALICIOUS

PDF

126.2 KB Created: 2020-08-05 18:24:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6e196e62495b3a88d3fb69e3ec41f9ed SHA-1: c968e7067a559c37ff3bf8067534200a470af74e SHA-256: 70699b12ce16d49736b41b36c6fd79a29d6822dd88b66694f670c301e8ee6dcb
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=definition+cerebral+palsy+pdf'. Another critical heuristic indicates a PDF link farm, with numerous external PDF links. The document body, though heavily obfuscated, contains the same redirector URL. This suggests the primary purpose is to direct users to malicious content, likely an advance-fee scam as indicated by the 'SE_ADVANCE_FEE_SCAM_LURE' heuristic.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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=definition+cerebral+palsy+pdf
    • http://files.portmelbournenetball.com/uploads/1/3/0/7/130776407/9072386.pdf
    • http://files.nesaraconstructions.com/uploads/1/3/1/3/131384484/fivizir_dutula_tozedodewafe_tidekag.pdf
    • http://files.literacygatewayinstitute.com/uploads/1/3/1/4/131409200/36ccce.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/6302/5567/files/54525995784.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/fatexuxutul.pdf
    • https://cdn.shopify.com/s/files/1/0433/8073/6151/files/vector_calculus_marsden.pdf
    • https://cdn.shopify.com/s/files/1/0431/8691/3439/files/fomefadezodezele.pdf
    • https://cdn.shopify.com/s/files/1/0434/6917/6985/files/84692930141.pdf
    • https://cdn.shopify.com/s/files/1/0438/2051/5488/files/morphology_of_flowering_plants_class_11_ncert_solutions.pdf
    • https://cdn.shopify.com/s/files/1/0432/1234/1412/files/7853468632.pdf
    • https://cdn.shopify.com/s/files/1/0429/7608/4117/files/916_758_8669.pdf
    • https://cdn.shopify.com/s/files/1/0434/6046/0701/files/gileloxeginilazatano.pdf
    • https://cdn.shopify.com/s/files/1/0430/3863/8241/files/66279384700.pdf
    • https://cdn.shopify.com/s/files/1/0434/2215/4908/files/mubuxebixinorumafuges.pdf
    • https://cdn.shopify.com/s/files/1/0435/6076/3555/files/37814823297.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_off0001ab46.bin
5af3c9934bccf5c201bc496a851d84fe728023b1e393ee7d70cec2c32a38bf10		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1AB46 5392 bytes
font_01_sfnt_off0001bdb3.bin
d8a13feff8dd9390dd52337b55384282e99fe605d835634a9e598f644c27b4b5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1BDB3 14416 bytes

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