Malicious PDF — malware analysis report

Static analysis result for SHA-256 80c7a0bbfa634bf3…

MALICIOUS

PDF

42.9 KB Created: 2020-08-14 20:59:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 267b3274e4f9481933c556bb9b2d9ca1 SHA-1: f6459cedd31b263b755266b5f727b30bb3780404 SHA-256: 80c7a0bbfa634bf3bb179a99bd7d4fb42ac77963479978c9ee49bab987060974
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external resources. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' indicates that at least one of these links directs to known malicious infrastructure. The 'PDF_SEO_LINK_FARM' heuristic further suggests that the document is designed to create a link farm, likely for SEO manipulation or to distribute malicious content. The document body contains text related to 'Bintulu port holdings bhd annual report' and includes the malicious URL, reinforcing the lure.

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=bintulu+port+holdings+bhd+annual+report
    • http://mareloma.themakerarian.com/uploads/1/3/1/4/131406226/420961212.pdf
    • http://files.brickyardphoto.com/uploads/1/3/0/7/130776712/411830.pdf
    • https://cdn.shopify.com/s/files/1/0433/9413/8268/files/pokemon_black_rom.pdf
    • https://cdn.shopify.com/s/files/1/0433/9807/0435/files/dibebevidevigumenilo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0913/8075/files/6491020144.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/90209356055.pdf
    • https://cdn.shopify.com/s/files/1/0429/9803/8679/files/a_natural_approach_to_second_language_acquisition_and_learning.pdf
    • https://cdn.shopify.com/s/files/1/0437/7886/7354/files/zegenumirigo.pdf
    • https://cdn.shopify.com/s/files/1/0434/2136/8482/files/65205036706.pdf
    • https://cdn.shopify.com/s/files/1/0429/2725/9811/files/94734353133.pdf
    • https://cdn.shopify.com/s/files/1/0437/9151/5809/files/92555257609.pdf
    • https://cdn.shopify.com/s/files/1/0431/7410/1160/files/21273734898.pdf
    • https://cdn.shopify.com/s/files/1/0435/0499/2408/files/actividades_auxiliares_de_comercio.pdf
    • https://cdn.shopify.com/s/files/1/0455/4385/0149/files/92433013698.pdf
    • https://cdn.shopify.com/s/files/1/0432/9799/6960/files/biblical_meaning_of_dreams_of_animals.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_off00004afd.bin
587f2b202725b0b89ec3f408e6d1bc0a9fbe56c65d0580b27727bcd96e5ea7eb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4AFD 5408 bytes
font_01_sfnt_off00005d4a.bin
e719fab141d50065c01a287a36c1b7cab519dbefabc2d7f2944d9913f58dfa82		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D4A 14208 bytes
font_02_sfnt_off000089a2.bin
df1d2c903cabdf2976887e260da0b25217edeb5ce2b71f315001024534e8e210		 pdf-font-stream PDF embedded font (sfnt) at offset 0x89A2 16060 bytes

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