Malicious PDF — malware analysis report

Static analysis result for SHA-256 92168763fdca402b…

MALICIOUS

PDF

47.3 KB Created: 2020-08-31 09:02:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0ef7ce1c6184ab9fbaf386eab804eacb SHA-1: a81139c7dd958670ba803f7163c8df6ee9f12e06 SHA-256: 92168763fdca402b398e11373ba54832770493478f055b944c84990df49dae8c
152 Risk Score

Malware Insights

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

The PDF was flagged as malicious by a machine learning classifier and contains a critical heuristic indicating it links to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the URL https://ttraff.com/wix?keyword=18+juillet+2018+acuario, which is associated with malicious activity. Additionally, the PDF exhibits characteristics of a link farm, with numerous external links pointing to various domains, suggesting a broad distribution or SEO-based lure strategy.

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/wix?keyword=18+juillet+2018+acuario
    • https://static.usrfiles.com/ugd/b88e3d_30694f0a360b43ae816e44a74178736f.pdf
    • https://static.usrfiles.com/ugd/b8c837_03a38d3ee55f42c0881c854eeebf817f.pdf
    • https://static.usrfiles.com/ugd/a2ebd8_dd61f81b9c354f8fa74f9c8602a596cf.pdf
    • https://static.usrfiles.com/ugd/77d535_b18609cf4de24430aa68d65809314cf2.pdf
    • https://static.usrfiles.com/ugd/b8c837_c0f0038b036a46fb83fd4948d088a571.pdf
    • https://static.usrfiles.com/ugd/b8c837_1786e8a9697c40ec83e66de10965cb1e.pdf
    • https://static.usrfiles.com/ugd/837d34_c27e482b9b284663991b1898df0443ca.pdf
    • https://static.usrfiles.com/ugd/de65f7_ecefabeff28847e294dba60d1f7f7725.pdf
    • https://cdn.shopify.com/s/files/1/0435/7505/0395/files/83540152744.pdf
    • https://cdn.shopify.com/s/files/1/0436/5543/0309/files/bill_gates_biography.pdf
    • https://cdn.shopify.com/s/files/1/0434/5777/3718/files/mathematics_10_tg.pdf
    • https://cdn.shopify.com/s/files/1/0432/7247/0686/files/adam_sandler_ode_to_my_car.pdf
    • https://cdn.shopify.com/s/files/1/0434/2448/1431/files/uniraj_b._ed_exam_form_2019.pdf
    • https://cdn.shopify.com/s/files/1/0437/0821/9547/files/51998212974.pdf
    • https://cdn.shopify.com/s/files/1/0431/0161/8327/files/86729201798.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_off00006287.bin
70be5f2d4217e3d05fad724b6dfc04107724e60b5c0505a2be15abd02c98d1c1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6287 4892 bytes
font_01_sfnt_off00007331.bin
dfdcae3045ff4eafd500ec34bfafe8f47cc1748e100f74dbe35e9ffa56dfbd45		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7331 15576 bytes
font_02_sfnt_off0000a09f.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA09F 4324 bytes

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