Malicious PDF — malware analysis report

Static analysis result for SHA-256 46d639fb395314f2…

MALICIOUS

PDF

53.4 KB Created: 2020-08-30 12:51:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 301cadc64cfe537bbac8164fd6c6610c SHA-1: d4527616aaef24afed1af9e8d15b9155a6b60916 SHA-256: 46d639fb395314f2ac7a6ca5007dcd16de41c6b0f44e73748dc59acf8ea69c16
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains a lure document titled 'Life's missing instruction manual' and embeds a link to a known malicious redirector. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK confirms this, and the ML classifier strongly indicates maliciousness. The file likely serves as a delivery mechanism for further malicious content via the redirector.

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/wix?keyword=life%2527s+missing+instruction+manual
    • https://static.usrfiles.com/ugd/8127dd_c77368311ed849e3bed6bb1e34121954.pdf
    • https://static.usrfiles.com/ugd/b8c837_c57a39f659d94095ad8bea18dad3c719.pdf
    • https://static.usrfiles.com/ugd/ce0e6d_4efc6d90df134c13ab854ffe8b717834.pdf
    • https://cdn.shopify.com/s/files/1/0428/7702/6463/files/muvalogo.pdf
    • https://cdn.shopify.com/s/files/1/0435/1993/4628/files/90392509726.pdf
    • https://cdn.shopify.com/s/files/1/0434/3264/0674/files/85302825000.pdf
    • https://cdn.shopify.com/s/files/1/0432/6214/8763/files/lifodewopineladaxi.pdf
    • https://cdn.shopify.com/s/files/1/0437/8561/7570/files/manolukafopero.pdf
    • https://cdn.shopify.com/s/files/1/0438/6249/1286/files/tosibugenafa.pdf
    • https://cdn.shopify.com/s/files/1/0440/0077/2254/files/correlative_conjunctions_exercises_multiple_choice.pdf
    • https://cdn.shopify.com/s/files/1/0434/7048/7712/files/similar_triangles_proofs_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0429/8709/4179/files/high_school_transcript_template_typable.pdf
    • https://cdn.shopify.com/s/files/1/0437/9348/1889/files/george_foreman_grill_instructions_st.pdf
    • https://static.usrfiles.com/ugd/73c254_9a511b21df6643f2953eb94292add05d.pdf
    • https://static.usrfiles.com/ugd/0dd040_41505722787f4c83b56d81ce204db5ac.pdf
    • https://static.usrfiles.com/ugd/b8c837_5c6cbe1d631246d2b27c5c00f0925dff.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_off000072b1.bin
3645dee89b4d1a5f2c3ab8a24a0d413529386070361b68078e4e822031389ead		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72B1 8180 bytes
font_01_sfnt_off00008e20.bin
c83db1f30994e9c5ec29ad94fe37a22c33d83e1978dd16e8935ec9ffb3630327		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8E20 5176 bytes
font_02_sfnt_off00009fad.bin
cd827f3df3fa7330069b74f6eb13f2aa8ad64ea2ef57192ddd9c29df8b608d2b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9FAD 11788 bytes

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