Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5c62a8f6c88082a…

MALICIOUS

PDF

59.0 KB Created: 2020-08-01 18:14:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c4af81399119ade34a73509b305f3386 SHA-1: 7d98ed8fac429ffdc814337a0a8b95a679060ea6 SHA-256: e5c62a8f6c88082a2f6afab46a390b2819b9ed2a88884ff4d1e3b5d9130379a4
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. It also exhibits characteristics of a PDF link farm, with numerous external links, many hosted on Shopify. The primary malicious URL identified is https://ttraff.com/pify?keyword=the+world+god+only+knows. The document body is heavily obfuscated and contains embedded URLs, reinforcing the malicious intent.

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=the+world+god+only+knows
    • http://files.millennialenterprise.org/uploads/1/3/1/3/131398084/8f19c5c9ec91e.pdf
    • http://files.newwestminsterchristadelphian.org/uploads/1/3/2/7/132740836/9b3acbd5743.pdf
    • http://files.blossomempowerment.com/uploads/1/3/0/9/130969974/zizemo.pdf
    • https://cdn.shopify.com/s/files/1/0427/8996/1884/files/88468855514.pdf
    • https://cdn.shopify.com/s/files/1/0431/0971/2021/files/22237632202.pdf
    • https://cdn.shopify.com/s/files/1/0438/2290/7549/files/zilujosevok.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tikodizexosuva.pdf
    • https://cdn.shopify.com/s/files/1/0429/7791/9129/files/weladegaperuxoj.pdf
    • https://cdn.shopify.com/s/files/1/0437/7378/8321/files/557585800.pdf
    • https://cdn.shopify.com/s/files/1/0430/6790/0061/files/biology_lab_manual_answers.pdf
    • https://cdn.shopify.com/s/files/1/0432/8888/7460/files/masozalasixatu.pdf
    • https://cdn.shopify.com/s/files/1/0428/0041/4883/files/bikikumoguro.pdf
    • https://cdn.shopify.com/s/files/1/0429/5147/5351/files/36410798400.pdf
    • https://cdn.shopify.com/s/files/1/0429/1808/4771/files/19748856658.pdf
    • https://cdn.shopify.com/s/files/1/0430/7966/3765/files/todumi.pdf
    • https://cdn.shopify.com/s/files/1/0431/2032/8853/files/xugajunof.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_off000076b0.bin
39a01a0f5b10f738574e6546236fb84c8f125009cece802c80d468655cca9a1e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76B0 15476 bytes
font_01_sfnt_off0000a866.bin
3e10817088340a4de1a1591d0367e01c63ee406c968bf709c829a6bebb9c4969		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA866 5084 bytes
font_02_sfnt_off0000b9c6.bin
dbef5c361d987224258ac6feee0ea261660b273a780058d0fcba8f6601c057ad		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB9C6 10440 bytes

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