Malicious PDF — malware analysis report

Static analysis result for SHA-256 8605194fdd4d3ac5…

MALICIOUS

PDF

40.8 KB Created: 2020-08-11 20:56:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 997b2d68d98de07548a3139a3bda314a SHA-1: d3f80f6087c4da98d18402cae19e92287ec3232e SHA-256: 8605194fdd4d3ac5b22e8f9d9aca2e69b45046c43ae86636c93ba2c1a49a38f8
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to a redirector service, which is a common tactic for distributing malicious content. The PDF also features a large number of links to other PDFs, suggesting a link farm designed to manipulate search engine results for SEO poisoning. The ML classifier strongly indicated maliciousness, and the presence of a malicious redirector URL supports this assessment.

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=holy+quran+malayalam+english+translation+pdf+free+download
    • http://files.pieterspinder.com/uploads/1/3/2/3/132303138/biwibosafematiwirag.pdf
    • http://files.mineviewaero.com/uploads/1/3/0/7/130775387/7764a2d38e103de.pdf
    • http://files.theresemcinerney.com/uploads/1/3/1/0/131070925/begivi.pdf
    • http://files.texascenterforregionalstudies.net/uploads/1/3/1/8/131856381/29afc.pdf
    • http://files.historyuntangled.org/uploads/1/3/2/6/132695829/voturuxa-mezukanozoruvib.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0432/5058/1662/files/western_states_and_capitals.pdf
    • https://cdn.shopify.com/s/files/1/0432/8180/9563/files/94639858744.pdf
    • https://cdn.shopify.com/s/files/1/0437/0500/8293/files/85545250969.pdf
    • https://cdn.shopify.com/s/files/1/0430/0128/2711/files/xojap.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mutiga.pdf
    • https://cdn.shopify.com/s/files/1/0434/3437/7372/files/a5_booklet_template.pdf
    • https://cdn.shopify.com/s/files/1/0435/8039/1583/files/nuzaxolapifib.pdf
    • https://cdn.shopify.com/s/files/1/0434/1478/2103/files/71098812164.pdf
    • https://cdn.shopify.com/s/files/1/0437/7254/3137/files/genetically_modified_organisms_examples.pdf
    • https://cdn.shopify.com/s/files/1/0431/3704/0538/files/psychology_of_love_book.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/61051106257.pdf
    • https://cdn.shopify.com/s/files/1/0434/1514/2551/files/95176804779.pdf
    • https://cdn.shopify.com/s/files/1/0431/6073/1808/files/zujogagijebulidafemetemuj.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000051ea.bin
51ddfb62c2d75cbdbaea02ee09f1dad14b4db0e8187d2199b668d0c9393290cb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x51EA 5620 bytes
font_01_sfnt_off000064e3.bin
345a5a2389a9ba996844596b7659713202a3193bbed120991aa5e54afe0cdf23		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64E3 10100 bytes
font_02_sfnt_off00008786.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8786 4324 bytes

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