Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c444af53cd34a58…

MALICIOUS

PDF

40.6 KB Created: 2020-08-24 19:47:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1a0708bf98657c045f9a015f81f96fe9 SHA-1: b9aa715e4a11cf65ab111a7fd1253795c7870bcd SHA-256: 3c444af53cd34a5878974b868785ebda23ddb424e2ec9d38d94344dc12ca19dd
152 Risk Score

Malware Insights

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

The PDF document contains a mass of external links, masquerading as a guide for 'Plague Inc. Evolved'. One of these links, 'https://ttraff.cc/pify?keyword=plague+inc+evolved+brutal+guide', is identified as a malicious redirector. The document's structure and content strongly suggest a phishing or malware distribution attempt by luring users to click on malicious URLs.

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=plague+inc+evolved+brutal+guide
    • http://napiz.tokyohumanities.org/uploads/1/3/1/4/131453027/jizul.pdf
    • https://cdn.shopify.com/s/files/1/0431/1020/3545/files/matum.pdf
    • https://cdn.shopify.com/s/files/1/0436/2852/7776/files/xiximusov.pdf
    • https://cdn.shopify.com/s/files/1/0431/2596/4949/files/4030_john_deere.pdf
    • https://cdn.shopify.com/s/files/1/0431/0417/4233/files/zijolibudakikoverazo.pdf
    • https://cdn.shopify.com/s/files/1/0428/3957/2643/files/15270218023.pdf
    • https://cdn.shopify.com/s/files/1/0427/3248/6823/files/83406444907.pdf
    • https://cdn.shopify.com/s/files/1/0432/5398/9534/files/zajitulejonapuxalen.pdf
    • https://cdn.shopify.com/s/files/1/0428/9167/3763/files/oracle_java_jdk_8_free.pdf
    • https://cdn.shopify.com/s/files/1/0428/3429/6988/files/toduvizemebu.pdf
    • https://cdn.shopify.com/s/files/1/0431/6987/4080/files/64545131051.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000619a.bin
cede57ef6c0887dd8a1bd6974bffa2783f388fafaa364631010cfb0f48c9f605		 pdf-font-stream PDF embedded font (sfnt) at offset 0x619A 5132 bytes
font_01_sfnt_off00007319.bin
21e04c995c4eb2646163c1d6a40209752282b551e05487a59c113dc081d58004		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7319 10212 bytes

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