Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c092a44bbf1db78…

MALICIOUS

PDF

44.9 KB Created: 2020-08-20 02:11:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2c0d0b4f3f049b6ab9a0bc8a34d6cf3e SHA-1: 4363a08213ffde087a7532118dbc3009c69fc1d7 SHA-256: 0c092a44bbf1db78f6831a98221e19338e1a6ed7af924df6ba583161a07e6c0c
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains text that appears to be a title related to 'ilmu retorika pdf', likely a lure. The presence of a malicious redirector and a large number of embedded links suggests an attempt to drive traffic to malicious infrastructure, potentially for further exploitation or phishing.

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=ilmu+retorika+pdf
    • http://fadajer.annaschneiderdesigns.com/uploads/1/3/0/7/130775734/xuger.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0459/6288/7335/files/juxolexobusexez.pdf
    • https://cdn.shopify.com/s/files/1/0431/1682/2679/files/amis_and_amiloun.pdf
    • https://cdn.shopify.com/s/files/1/0433/4695/2351/files/bomberman_collection_pc.pdf
    • https://cdn.shopify.com/s/files/1/0434/6236/1245/files/best_chinese_chess_app_android.pdf
    • https://cdn.shopify.com/s/files/1/0429/6874/4087/files/mibirezobobiw.pdf
    • https://cdn.shopify.com/s/files/1/0451/1842/3194/files/metamorphosis_in_arthropods.pdf
    • https://cdn.shopify.com/s/files/1/0432/3010/1668/files/15537279117.pdf
    • https://cdn.shopify.com/s/files/1/0440/8459/2805/files/sony_str_de845.pdf
    • https://cdn.shopify.com/s/files/1/0430/1560/2339/files/9272064048.pdf
    • https://cdn.shopify.com/s/files/1/0431/8671/6830/files/casti_guidebook_to_asme_section_ix_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0436/9471/9131/files/hypothesis_worksheet_middle_school.pdf
    • https://cdn.shopify.com/s/files/1/0439/0646/5947/files/82711333540.pdf
    • https://cdn.shopify.com/s/files/1/0440/1538/6789/files/84016103899.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_off000072ed.bin
d82e3e2e7774eb7a742d5744bf9ca9a33bf3cfd9f430de751537bae965a65340
pdf-font-stream PDF embedded font (sfnt) at offset 0x72ED 5012 bytes
font_01_sfnt_off000083e4.bin
48e51aacde463f7507afe2bf3fdb64450610c4f2f70a4e93781d8d73b2765144
pdf-font-stream PDF embedded font (sfnt) at offset 0x83E4 10320 bytes