Malicious PDF — malware analysis report

Static analysis result for SHA-256 06b08fa0dbf7e769…

MALICIOUS

PDF

67.2 KB Created: 2020-08-12 08:45:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0ea5fce799c2d3677af0f358215d9ee0 SHA-1: 97f3115ee9794993123c9bd5a9779b2cc79fc61f SHA-256: 06b08fa0dbf7e7699e5a1489d8d192a2ccab4c6c99bc821ae110a924d107961c
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links, with one prominently pointing to a known malicious redirector. The document body, though heavily obfuscated, includes the target URL and mentions 'different topologies pdf', suggesting a lure. The presence of numerous PDF links, many pointing to external resources, indicates a link farm designed to obscure the malicious destination. No scripts were extracted, but the primary attack vector appears to be directing users to malicious infrastructure via embedded links.

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=different+topologies+pdf
    • http://paduno.bhseducationfoundation.com/uploads/1/3/1/0/131070571/wifowevuvuzasiv_kelizetekax_sidugo_ripow.pdf
    • http://files.copartnershipforthrivingfamilies.org/uploads/1/3/2/6/132695387/xiral_xajekul_wegijal_lefumat.pdf
    • http://lipepoj.ufsigninggators.org/uploads/1/3/1/6/131607163/lopena.pdf
    • http://vulowuzil.gardencovepark.com/uploads/1/3/1/6/131606027/gajaguzujom.pdf
    • http://files.bellehale.com/uploads/1/3/0/7/130775387/jifedevijilo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0427/6033/9623/files/lakavamimuraronuri.pdf
    • https://cdn.shopify.com/s/files/1/0433/3309/1480/files/malayala_manorama_calendar_june_2020.pdf
    • https://cdn.shopify.com/s/files/1/0431/0423/9770/files/64560813259.pdf
    • https://cdn.shopify.com/s/files/1/0430/7389/6615/files/attitudinal_and_behavioural_loyalty.pdf
    • https://cdn.shopify.com/s/files/1/0432/5598/8374/files/19212627231.pdf
    • https://cdn.shopify.com/s/files/1/0434/5135/1200/files/62077251292.pdf
    • https://cdn.shopify.com/s/files/1/0437/4714/7928/files/art_and_the_christian_apocrypha.pdf
    • https://cdn.shopify.com/s/files/1/0430/7727/1716/files/grandma_s_boy_soundtrack.pdf
    • https://cdn.shopify.com/s/files/1/0431/5932/2778/files/saxizalomikipixuxif.pdf
    • https://cdn.shopify.com/s/files/1/0445/3256/4132/files/personality_traits_list.pdf
    • https://cdn.shopify.com/s/files/1/0432/8544/6824/files/burger_king_gutscheine_2020_oktober.pdf
    • https://cdn.shopify.com/s/files/1/0433/7840/9639/files/13159834585.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c934.bin
483fba52532d67e8526e66bc493e635a17f059e96e873ab7ee8afaefb14c8780		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC934 4996 bytes
font_01_sfnt_off0000da4c.bin
f21313e53ed0e6190010795cb6f5c3ef2e41cc55f711cbcc142240d905b12240		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDA4C 10856 bytes

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