Malicious PDF — malware analysis report

Static analysis result for SHA-256 5aba0640efea32b0…

MALICIOUS

PDF

37.6 KB Created: 2020-08-10 02:40:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4d738400041ddcd7011c82e3beb63a83 SHA-1: e879ca93ad75a083c66e3fd429024dfd7d0841c3 SHA-256: 5aba0640efea32b0d3adfddabf83c665f055083b32fcaaef783297622ac52ebd
154 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded links, many of which point to external PDF files, suggesting a link farm or SEO manipulation tactic. One prominent URL, 'https://ttraff.com/pify?keyword=panduan+akreditasi+puskesmas+2020+pdf', is identified as a malicious redirector. The document's content, though partially obfuscated, appears to be a lure related to hospital accreditation, aiming to drive traffic to malicious infrastructure.

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=panduan+akreditasi+puskesmas+2020+pdf
    • http://files.clearlake8ball.net/uploads/1/3/1/0/131070375/7242159.pdf
    • http://files.myjlstyle.com/uploads/1/3/2/7/132740949/tixadetibun.pdf
    • http://files.tyner.ca/uploads/1/3/1/0/131069869/9252713.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0449/0412/0475/files/how_to_grow_your_discord_server.pdf
    • https://cdn.shopify.com/s/files/1/0438/8637/9163/files/list_docker_containers.pdf
    • https://cdn.shopify.com/s/files/1/0431/6450/0122/files/neoplasia_maligna_de_pulmon.pdf
    • https://cdn.shopify.com/s/files/1/0438/6701/3280/files/7_natural_wonders_of_the_world.pdf
    • https://cdn.shopify.com/s/files/1/0431/6554/8708/files/gatizuxisigidepux.pdf
    • https://cdn.shopify.com/s/files/1/0430/7261/8657/files/censor_beep_sound.pdf
    • https://cdn.shopify.com/s/files/1/0449/3757/6603/files/banking_chronicle_june_2020.pdf
    • https://cdn.shopify.com/s/files/1/0437/9734/8514/files/gumakekabosazizosedakuso.pdf
    • https://cdn.shopify.com/s/files/1/0428/6545/9366/files/mumuzizaf.pdf
    • https://cdn.shopify.com/s/files/1/0428/0382/2755/files/jenegudusuwuvedotifegij.pdf
    • https://cdn.shopify.com/s/files/1/0433/6641/6534/files/japamogimojudaxefu.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_off00005433.bin
71a34885d04f69af560f2138941d893c4206916442b2fa40094ef5672a0c7a99
pdf-font-stream PDF embedded font (sfnt) at offset 0x5433 5496 bytes
font_01_sfnt_off000066d3.bin
4269d9d540ad19e037800e8c7daed680cae57b88e2a1a935575e0455476c4ae6
pdf-font-stream PDF embedded font (sfnt) at offset 0x66D3 10060 bytes