Malicious PDF — malware analysis report

Static analysis result for SHA-256 bae186dfb5fa305e…

MALICIOUS

PDF

56.4 KB Created: 2020-08-06 11:30:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 193c79499ecfa03e89f0e311d84e86f9 SHA-1: c5dec27952a26b5c59e9d0d1379e9cb7f85669b4 SHA-256: bae186dfb5fa305e305809686a6e96e363a121f5c863709f832d35b6bb35f3ff
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a deceptive title and a link that redirects to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The ML classifier also strongly flagged this PDF as malicious. The embedded URL points to a redirector service, suggesting a phishing or malware distribution attempt.

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=tableau+10+business+intelligence+cookbook+pdf+free+download
    • http://rugaraf.rabbitcustom.com/uploads/1/3/0/9/130969465/4523253.pdf
    • http://files.mountainspassion.com/uploads/1/3/0/7/130775528/surelekekibawoz.pdf
    • http://files.professionalcapitalpartners.com/uploads/1/3/0/7/130775940/buzozele.pdf
    • http://files.goodmeasureliving.com/uploads/1/3/2/7/132712282/kumozoz_xabufiwuraxuben_sudolujum_mugivibebuvesem.pdf
    • http://files.buypartseasy.com/uploads/1/3/1/4/131407709/5db59.pdf
    • https://cdn.shopify.com/s/files/1/0429/6821/9799/files/bazoxubiwajekinoronoramod.pdf
    • https://cdn.shopify.com/s/files/1/0433/9017/3333/files/87463687272.pdf
    • https://cdn.shopify.com/s/files/1/0430/9535/9641/files/tojip.pdf
    • https://cdn.shopify.com/s/files/1/0438/8870/5688/files/javascript_combine_arrays.pdf
    • https://cdn.shopify.com/s/files/1/0434/1311/0951/files/365_bible_stories.pdf
    • https://cdn.shopify.com/s/files/1/0429/8915/8554/files/bupabiburizugejumiseli.pdf
    • https://cdn.shopify.com/s/files/1/0440/2338/2166/files/sozivemonukonevamitolotor.pdf
    • https://cdn.shopify.com/s/files/1/0437/1818/1016/files/9755994013.pdf
    • https://cdn.shopify.com/s/files/1/0432/8236/6629/files/67253504472.pdf
    • https://cdn.shopify.com/s/files/1/0437/5651/9585/files/sisiponomavi.pdf
    • https://cdn.shopify.com/s/files/1/0430/9463/8749/files/xuguretobukulolegudote.pdf
    • https://cdn.shopify.com/s/files/1/0431/6908/7642/files/mimemizagorajomewaf.pdf
    • https://cdn.shopify.com/s/files/1/0435/0076/5348/files/pubajadodewitefu.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_off00009ab0.bin
acecf24d1125f533c9930f35a7a3ec0f4501c21f4fbe97e21ec129102be25791		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9AB0 5764 bytes
font_01_sfnt_off0000ae76.bin
cf15bd0083adfe2e0089569d7cc69b4f0b08e487cffba4b6005b8cf24b24c0f2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAE76 10824 bytes

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