Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe4d65d565ce81b0…

MALICIOUS

PDF

51.7 KB Created: 2020-08-23 01:51:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c6021a1ded484650edab1a58a25fff58 SHA-1: 276074e17e6e2ce3002cb16da5a9a59b5ab5ec1b SHA-256: fe4d65d565ce81b0f5ddb7ce3ef584010c5b949df04d7fe859bda6c8eedcea93
152 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic firing indicating a malicious redirector. The document body, though partially corrupted, contains text referencing a movie title and the malicious URL, suggesting a lure to a phishing or malware distribution site. The ML classifier also strongly indicated maliciousness.

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.ru/pify?keyword=bengali+movie+shikari+full+hd
    • http://files.melodylilab.org/uploads/1/3/0/9/130969045/154671.pdf
    • http://files.power-up-potential.com/uploads/1/3/2/6/132682806/1836450.pdf
    • http://dofaru.kaydanley.com/uploads/1/3/1/3/131384609/lavam-fixoxi-xorafafig.pdf
    • http://lasejad.psvideography.com/uploads/1/3/0/8/130814328/256eddb6d3e04.pdf
    • https://cdn.shopify.com/s/files/1/0447/3847/8229/files/zufalizubojele.pdf
    • https://cdn.shopify.com/s/files/1/0429/9204/2137/files/nunipubetexizuk.pdf
    • https://cdn.shopify.com/s/files/1/0429/4941/0979/files/losilavanekesakumura.pdf
    • https://cdn.shopify.com/s/files/1/0433/3305/8715/files/consequentialism_and_deontology.pdf
    • https://cdn.shopify.com/s/files/1/0437/2961/7057/files/sapunalakawikorotulo.pdf
    • https://cdn.shopify.com/s/files/1/0440/6745/5128/files/881671579.pdf
    • https://cdn.shopify.com/s/files/1/0433/3253/4440/files/50837313172.pdf
    • https://cdn.shopify.com/s/files/1/0441/0785/8072/files/luxekudefolireferigawek.pdf
    • https://cdn.shopify.com/s/files/1/0431/5290/0250/files/tusojikimise.pdf
    • https://cdn.shopify.com/s/files/1/0434/0069/1879/files/customer_satisfaction_form_template_word.pdf
    • https://cdn.shopify.com/s/files/1/0434/0459/1271/files/lebejulewidegizuxuzu.pdf
    • https://cdn.shopify.com/s/files/1/0438/2742/9533/files/nudapuwalosipudatisajeze.pdf
    • https://cdn.shopify.com/s/files/1/0432/2466/2173/files/skilled_occupation_list_australia_2020_19.pdf
    • https://cdn.shopify.com/s/files/1/0431/5276/9192/files/62780844137.pdf
    • https://cdn.shopify.com/s/files/1/0432/0428/0481/files/vokilatajutukisawopogofe.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_off00006939.bin
91d5502a4cca558241e61ffdc82c5b885b9d4d1286f31df23fd5bc2024bfad19		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6939 5492 bytes
font_01_sfnt_off00007bbf.bin
4835f6424ac768cd7410ed77185c9d0f6620bfd4773aaa42795122b5521f7182		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7BBF 10964 bytes
font_02_sfnt_off00009f42.bin
f7ab52f234545e3950abd83e4a0fc004b7a53d2a10b48dfa3bfb6547ade3f597		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9F42 9900 bytes

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