Malicious PDF — malware analysis report

Static analysis result for SHA-256 a60ff31643ad2dc2…

MALICIOUS

PDF

45.7 KB Created: 2020-08-12 15:20:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 354ca4def07ea631f72aceb17f02a77c SHA-1: 51881c2c206586dd78514ce864a43250bcf5a6f1 SHA-256: a60ff31643ad2dc2f0d00226cb6035071b4c92f828566139e2c5ab510a72ec48
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links, with the primary redirector URL being 'https://ttraff.cc/wb?keyword=gejala%20sosial%20di%20masyarakat%20pdf'. The majority of the links point to a link farm hosted on Shopify, suggesting an attempt to manipulate search engine results or obscure the true destination of the malicious redirector. The ML classifier strongly indicated maliciousness.

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/wb?keyword=gejala%20sosial%20di%20masyarakat%20pdf
    • http://files.yourpassionategroomer.com/uploads/1/3/1/8/131856574/vevigafevuju-mulogukufov-nipanemofawemo.pdf
    • http://files.bloominozzieclicks.com/uploads/1/3/1/4/131437380/jatigirozifil.pdf
    • http://files.stephenvillavaso.com/uploads/1/3/1/3/131378899/2137277.pdf
    • http://punatejuv.mtnviewladylax.com/uploads/1/3/1/4/131406893/1f8d193c8cc0.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/17673355306.pdf
    • https://cdn.shopify.com/s/files/1/0430/7727/1713/files/5852207947.pdf
    • https://cdn.shopify.com/s/files/1/0431/2255/7082/files/44619235942.pdf
    • https://cdn.shopify.com/s/files/1/0437/7824/4765/files/bruno_munari_libri.pdf
    • https://cdn.shopify.com/s/files/1/0432/2109/0471/files/lazurufobuseno.pdf
    • https://cdn.shopify.com/s/files/1/0430/5892/1621/files/46341091187.pdf
    • https://cdn.shopify.com/s/files/1/0431/5679/9648/files/sintomas_del_cancer_de_mama.pdf
    • https://cdn.shopify.com/s/files/1/0445/2705/9103/files/49166541407.pdf
    • https://cdn.shopify.com/s/files/1/0427/7207/0556/files/ceramic_materials_carter.pdf
    • https://cdn.shopify.com/s/files/1/0435/9127/0563/files/gefin.pdf
    • https://cdn.shopify.com/s/files/1/0429/2254/1209/files/74071391178.pdf
    • https://cdn.shopify.com/s/files/1/0435/2186/7930/files/elevation_worship_do_it_again_chords.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006b93.bin
619a3abc4559cd82df71a1c5eb5d511977741b64bde6b3f2ec7ee38567e12137		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B93 5460 bytes
font_01_sfnt_off00007e21.bin
51ebeec29509b87aa858d500e37ac8853184703d07d1f913ce36d8e1dc7764c0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E21 1800 bytes
font_02_sfnt_off000086af.bin
c61ed4c8a4b44b17b822a1876180df7171758a2fe96b4009e7f346730aa20342		 pdf-font-stream PDF embedded font (sfnt) at offset 0x86AF 10052 bytes

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