Malicious PDF — malware analysis report

Static analysis result for SHA-256 0bd95f38d640654a…

MALICIOUS

PDF

50.9 KB Created: 2020-08-25 17:32:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 385abf0646eaa1979dfc62ed71eea04c SHA-1: f8a10db1db79a8da8359a8586c406e24baac09b5 SHA-256: 0bd95f38d640654a0ebe46af6c0bf2bf5a289cebe1e832d31f1da93807fc2248
154 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body text, though partially obfuscated, includes the lure "Cervical cancer treatment guidelines pdf" and a URL pointing to a redirector. This suggests a phishing attempt to direct users to a malicious site, likely for further exploitation or credential harvesting.

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.cc/pify?keyword=cervical+cancer+treatment+guidelines+pdf
    • http://files.mythermaltv.com/uploads/1/3/1/4/131452817/0c1befff.pdf
    • http://files.ccbigeorgia.com/uploads/1/3/0/7/130776126/logibunigem-delolizo-rebozivonubefar.pdf
    • http://files.sanotherapia.com/uploads/1/3/0/7/130776861/lopupu_mumega_naluritoxutavod.pdf
    • http://files.hairbymandybrothers.com/uploads/1/3/0/9/130969673/morenim_fobozawew_dojodoposili.pdf
    • http://files.michaelmoore.studio/uploads/1/3/1/3/131383775/kulipojuxufix.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0461/3881/8713/files/30874823663.pdf
    • https://cdn.shopify.com/s/files/1/0430/6193/6290/files/belotuxogotopanimamene.pdf
    • https://cdn.shopify.com/s/files/1/0431/4929/5776/files/38236139248.pdf
    • https://cdn.shopify.com/s/files/1/0436/2859/3315/files/flow_wrapping_machine_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/6749/7880/files/zepokeduno.pdf
    • https://cdn.shopify.com/s/files/1/0434/4751/7341/files/28253930435.pdf
    • https://cdn.shopify.com/s/files/1/0431/2642/3701/files/jabobuvij.pdf
    • https://cdn.shopify.com/s/files/1/0429/8476/7641/files/46244599361.pdf
    • https://cdn.shopify.com/s/files/1/0434/0118/3384/files/boot_camp_mod_apk_free.pdf
    • https://cdn.shopify.com/s/files/1/0434/5462/7993/files/bihar_board_admit_card_2020_download.pdf
    • https://cdn.shopify.com/s/files/1/0440/8305/2696/files/fijaj.pdf
    • https://cdn.shopify.com/s/files/1/0430/4066/9849/files/gejuguwavifegemeboxebi.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_off00007ced.bin
c8b7adff416f7f6fe8ef5cf8d7e5760b07e887d8f542ce9d4076b3f2b5f0acbb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7CED 5328 bytes
font_01_sfnt_off00008ef5.bin
1efb7e93dbae79091b9f6252aa97d4d87f40e2572915cfaf724ea00733d0913c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8EF5 9784 bytes
font_02_sfnt_off0000b071.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB071 4324 bytes

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