Malicious PDF — malware analysis report

Static analysis result for SHA-256 a572a0cb7c6a64ee…

MALICIOUS

PDF

38.4 KB Created: 2020-08-15 05:24:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 31e45015faa8f3c119d4d665c1cd7282 SHA-1: cbf2b0b0352c622f70877b5b9025ca137f90242f SHA-256: a572a0cb7c6a64eeebdfd28c3e3848921ae95c066a26880df60db42e8f9db3b7
152 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier as malicious and contains a link farm of numerous PDF files. One of the embedded links, 'https://ttraff.cc/pify?keyword=arabic+oriental+house+music+remix', points to known malicious redirector infrastructure. The document body contains garbled text and a reference to the malicious URL, suggesting a lure to a malicious site.

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/pify?keyword=arabic+oriental+house+music+remix
    • http://nuxejupe.sbcopywriting.com/uploads/1/3/0/8/130814328/zilegoxekiditem_gewivelokidogi.pdf
    • https://cdn.shopify.com/s/files/1/0440/6876/5861/files/68253608392.pdf
    • https://cdn.shopify.com/s/files/1/0434/1307/8168/files/github_push_code.pdf
    • https://cdn.shopify.com/s/files/1/0432/3724/5086/files/tutakitimu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/81603963226.pdf
    • https://cdn.shopify.com/s/files/1/0438/4745/0774/files/puzogaxip.pdf
    • https://cdn.shopify.com/s/files/1/0432/3049/4878/files/pigumikevuterarozokop.pdf
    • https://cdn.shopify.com/s/files/1/0444/3032/7975/files/zoxopanatusovolu.pdf
    • https://cdn.shopify.com/s/files/1/0429/7526/4919/files/the_law_of_non_international_armed_conflict.pdf
    • https://cdn.shopify.com/s/files/1/0433/4492/0734/files/73008941522.pdf
    • https://cdn.shopify.com/s/files/1/0434/2553/0005/files/87460752321.pdf
    • https://cdn.shopify.com/s/files/1/0431/9484/3298/files/34822320041.pdf
    • https://cdn.shopify.com/s/files/1/0431/3445/1874/files/namumilobub.pdf
    • https://cdn.shopify.com/s/files/1/0430/2936/4885/files/lenenirokiveladatuwuwejof.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000059e8.bin
229ef0bdaa9ad607a30d9cc54e767268344c6af1209820826310488a52365300
pdf-font-stream PDF embedded font (sfnt) at offset 0x59E8 5236 bytes
font_01_sfnt_off00006b7f.bin
e0ff3d42748836b57a47a3eac0de464bbf77e9d1c798129354824541f9393aac
pdf-font-stream PDF embedded font (sfnt) at offset 0x6B7F 9776 bytes