Malicious PDF — malware analysis report

Static analysis result for SHA-256 0fae477d410a2d61…

MALICIOUS

PDF

45.6 KB Created: 2020-08-08 16:10:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7f44e032cf54da9a0f45c88935a5c39e SHA-1: ed82f315c6d46d08b60fe5bb30e123c8defc32e6 SHA-256: 0fae477d410a2d61f5fa8edd53dbf7dc3ecb5e9d7dca4c8601fd8222109710f7
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to external PDF files, suggesting a link farm or SEO poisoning attempt. One of the primary links redirects to a known malicious domain, indicating a phishing or malware distribution attempt. The ML classifier also strongly flagged this PDF as malicious.

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.ru/pify?keyword=a+manual+of+acarology+krantz+pdf+free
    • http://files.suttonclassroom.com/uploads/1/3/2/6/132695388/lolakozopigujo.pdf
    • http://files.tayloredtoyouevents.com/uploads/1/3/2/6/132681992/gasurarewi_kofevepopunugiw.pdf
    • http://bosubib.chillbp.com/uploads/1/3/1/4/131482995/4285483.pdf
    • http://gadizami.livedosh.com/uploads/1/3/2/6/132681556/lekejigol.pdf
    • http://files.solidrockinternationalschoolofministries.com/uploads/1/3/0/9/130969059/mojidupivoziwenejim.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0439/5096/4904/files/jivenimimamuwivavibise.pdf
    • https://cdn.shopify.com/s/files/1/0431/4693/6482/files/96707075568.pdf
    • https://cdn.shopify.com/s/files/1/0434/8218/5893/files/zaxugomifala.pdf
    • https://cdn.shopify.com/s/files/1/0438/1235/6253/files/65414443015.pdf
    • https://cdn.shopify.com/s/files/1/0431/6237/0202/files/26284732187.pdf
    • https://cdn.shopify.com/s/files/1/0430/9437/6599/files/39442644437.pdf
    • https://cdn.shopify.com/s/files/1/0434/5207/2086/files/70247186956.pdf
    • https://cdn.shopify.com/s/files/1/0432/3121/5780/files/53625143686.pdf
    • https://cdn.shopify.com/s/files/1/0432/3672/0808/files/98137369393.pdf
    • https://cdn.shopify.com/s/files/1/0428/7224/2342/files/bojeg.pdf
    • https://cdn.shopify.com/s/files/1/0430/4932/0610/files/ferudevujurebetemadosi.pdf
    • https://cdn.shopify.com/s/files/1/0429/6055/2085/files/61195980367.pdf
    • https://cdn.shopify.com/s/files/1/0430/0800/0163/files/15871674555.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_off00006dcd.bin
0cfef4a95690dc5f85b346fadef2c044f05926fae2aa54a8bbdbaf95b4f047c0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DCD 5504 bytes
font_01_sfnt_off00008086.bin
310d525af3ecb5bb09d2faf4d513c099ace80cd85c12f74fed2e5bae3aeccb1e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8086 11552 bytes

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