Malicious PDF — malware analysis report

Static analysis result for SHA-256 14123fadbf8a3a1f…

MALICIOUS

PDF

46.9 KB Created: 2020-09-17 05:21:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0398bd49367b3d9e60ae03cd52772278 SHA-1: baecd3f34d9a139a5fa8f27b92377a1b47eb3b0b SHA-256: 14123fadbf8a3a1fb41da184bee8e3751839d3c1fb7344f49ae59fbf8684c63f
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 suspicious domains and are flagged as part of a link farm. One URL, 'https://ttraff.com/pify?keyword=how+to+grow+taller+yahoo+answers', is specifically identified as a malicious redirector. The document body, though heavily obfuscated, also contains this URL and other links, suggesting a phishing or scam attempt to redirect users to malicious infrastructure.

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.com/pify?keyword=how+to+grow+taller+yahoo+answers
    • http://zozuv.drexelteachers.com/uploads/1/3/2/7/132740186/7533045.pdf
    • http://rilalalaz.pooltablesandsupplies.com/uploads/1/3/1/6/131607662/jerujafolovenogomomo.pdf
    • http://motus.drawtastic.org/uploads/1/3/1/4/131483065/1795248.pdf
    • http://vameji.topdogservicedogs.org/uploads/1/3/1/0/131070611/1c4a44d77.pdf
    • http://bukik.spgallagher.com/uploads/1/3/0/8/130813780/dafetazatekorug.pdf
    • http://zejateveg.moodyabdul.com/uploads/1/3/0/7/130738779/nedavewa_siwijurezuve_soxafaberixavod_gotolu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0483/0501/2898/files/direct_square_law_example.pdf
    • https://cdn.shopify.com/s/files/1/0463/6173/9419/files/3591188223.pdf
    • https://dc17fe28-bb25-4dbf-8d26-420370f70258.filesusr.com/ugd/1ee69b_66fb6b240f474a3fa6391ea3068058a5.pdf?index=true
    • https://63c75e1e-8e41-449d-b18a-94da43d0a3e8.filesusr.com/ugd/b6bf5b_58d74c709d014c80a9dd71fe3c59bc00.pdf?index=true
    • https://3c01c0ef-04ae-476d-8292-65bf098aa5fc.filesusr.com/ugd/d63aaf_3cb4866d4d1d4b2fb5f94026c1058d68.pdf?index=true
    • https://351fc1f7-9d1f-46cb-8902-2ec4de135406.filesusr.com/ugd/e2c6c1_4af3494398db4059bfebaac5ddeaed79.pdf?index=true
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006c6e.bin
bced19e99c97660e3bd51ab70985acea0516927992ea72ee939c9dc5b81adea4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C6E 4840 bytes
font_01_sfnt_off00007cec.bin
99eaf5af50c565480e3c4af8cd47160664d30a9ab9d143857b7f63136304a94f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7CEC 10536 bytes
font_02_sfnt_off0000a0f2.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA0F2 4324 bytes

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